1901-1925
A
- A.A. Brill papers, 1888-1994.
- Aaron Copland collection, 1841-1991.
- Abbe, Cleveland, 1838-1916. Cleveland Abbe papers, 1850-1954.
- Abbott Lawrence Rotch papers 1896-1912.
- Abel Doysié papers, 1910-1967.
- Abraham Flexner papers, 1865-1989.
- Abraham, Karl, 1877-1925. Karl Abraham papers, 1908-1925.
- Abraham Lincoln papers, 1774-1948.
- Abram P.T. Elder papers, 1890-1916.
- Acheson, Edward Goodrich, 1856-1931. A pathfinder: discovery, invention and industry; how the world came to have aquadag and oildag; also carborundum, artificial graphite and other valuable products of the electric furnace. The first of a series of educational biographical sketches of eminent inventors. 1910.
- Acheson, Edward Goodrich, 1856-1931. Edward Goodrich Acheson papers, 1872-1968.
- Adams, Leason Heberling, 1887-1969. Leason Heberling Adams papers, 1919-1968.
- Adee, Alvey A. (Alvey Augustus), 1842-1924. Alvey A. Adee papers.
- Adee, Augustus Alvey, 1802-1844. Augustus Alvey Adee papers.
- Adee, David Graham, 1837-1901. David Graham Adee papers.
- Adee family. Adee family papers, 1824-1966.
- Adee family papers, 1824-1966.
- Adelaide Johnson papers, 1873-1947.
- Adelaide Rosalia Hasse papers, 1862-1951.
- Adolph Bolm collection, 1895-1982.
- Adolph Caspar Miller papers, 1913-1947.
- Adolph Law Voge papers, 1915-1939.
- A.E. Housman papers, 1906-1940.
- Aero Club of America. Aero Club of America scrapbooks, 1891-1912.
- Aero Club of America scrapbooks, 1891-1912.
- L'Aerophile collection, 1876-1949.
- A.K. Fisher papers, 1827-1957.
- Albert Einstein papers, 1916-1953.
- Albert Gleaves papers, 1803-1946.
- Albert Jeremiah Beveridge papers, 1788-1943.
- Albert Payson Terhune papers, 1890-1957.
- Albert Sidney Burleson papers, 1845-1943.
- Alberto Nepomuceno collection, 1887-1920.
- Aldrich, Abby Pearce Chapman, 1845-1917. Abby Pearce Chapman Aldrich diaries. 1904-1912.
- Aldrich family. John Aldrich Stephenson collection of the Hand, Fiske, and Aldrich families papers. 1745-1966.
- Aldrich, Morton Arnold, 1874-1956. Morton Arnold Aldrich papers.
- Aldrich, Nelson W. (Nelson Wilmarth), 1841-1915. Nelson W. Aldrich papers, 1777-1930.
- Aldrich, Thomas Bailey, 1836-1907. Thomas Bailey Aldrich papers, 1873-1901.
- Aldrich, Zoë Worthington Fiske, 1864-1942. Zoë Worthington Fiske Aldrich papers.
- Alexander Freud and Sophie Schreiber Freud papers, 1872-1965.
- Alexander Graham Bell family papers, 1834-1974.
- Alexander Jeffrey McKelway papers, 1814-1942.
- Alexandra Danilova collection, 1920-2000.
- Alexis Vasilevich Babine papers, 1895-1953.
- Alfred Easton Poor papers, 1866-1985.
- Alice Roosevelt Longworth papers, 1888-1942.
- Allen, Charles Julius, 1840-1915. Charles Julius Allen papers.
- Allen, Florence Ellinwood, 1884-1966. Florence Ellinwood Allen papers, 1907-1965.
- Allen, Grace Elizabeth, 1886-1976. Grace Elizabeth Allen papers.
- Allen, Henry Justin, 1868-1950. Henry Justin Allen papers, 1896-1942.
- Allen, Henry T. (Henry Tureman), 1859-1930. Henry T. Allen papers, 1806-1933.
- Allison, Mary Ireland, d.1870. Mary Ireland Allison diary. 1868-1869.
- Allison, William Henry, 1870-1941. William Henry Allison diaries, 1868-1940.
- Alma Gluck scrapbooks and other materials, 1902-1940.
- Alton B. Parker papers, 1878-1937.
- Ameen Fares Rihani papers, 1897-1940.
- American Colonization Society. American Colonization Society records, 1792-1964.
- American Colonization Society records, 1792-1964.
- American Colony in Jerusalem collection, circa 1786-2007.
- American Colony (Jerusalem). American Colony in Jerusalem collection, circa 1786-2007.
- American Federation of Labor. American Federation of Labor records, 1883-1925.
- American Federation of Labor records, 1883-1925.
- American Gold Star Mothers, Inc. American Gold Star Mothers, Inc., records, 1917-1941.
- American Gold Star Mothers, Inc., records, 1917-1941.
- American Institute of Aeronautics and Astronautics. Institute of Aerospace Sciences archives, 1783-1962.
- Amory Austin collection relating to heraldry, 1865-1917.
- Amos Pinchot papers, 1856-1945.
- Andersen, Hendrik Christian, 1872-1940. Hendrik Christian Andersen papers, 1844-1940.
- Andersen, Olivia Cushing, b. 1871. Olivia Cushing Andersen papers. 1882-1929.
- Anderson, Chandler P. (Chandler Parsons), 1866-1936. Chandler P. Anderson papers, 1894-1953.
- Anderson, Frank Maloy, 1871-1961. Frank Maloy Anderson papers, circa 1895-circa 1961.
- Anderson, Maxwell, 1888-1959. Maxwell Anderson papers, 1920-1989.
- Andrew Carnegie papers, 1803-1935.
- Angelo Patri papers, 1904-1962.
- Anita Newcomb McGee papers, 1688-1932.
- Anna E. Dickinson papers, 1859-1951.
- Anson Burlingame and Edward L. Burlingame family papers, 1810-1922.
- Antheil, Böske. George and Böske Antheil papers. 1875-1984.
- Antheil, George, 1900-1959. George and Böske Antheil papers. (2)
- Antheil, George, 1900-1959. George and Böske Antheil papers, 1875-1984.
- Antheil, George, 1900-1959. George Antheil correspondence to Stanley Hart. (2)
- Antheil, George, 1900-1959. George Antheil correspondence to Stanley Hart, 1919-1931.
- Antheil, George, 1900-1959. George Antheil correspondence with Mary Louise Curtis Bok. (2)
- Antheil, George, 1900-1959. George Antheil correspondence with Mary Louise Curtis Bok, 1921-1940.
- Anthony League of the District of Columbia. Anthony League of the District of Columbia records.
- Anthony, Mary S. Mary S. Anthony papers.
- Anthony, Susan B. (Susan Brownell), 1820-1906. Susan B. Anthony papers, 1846-1934.
- Appleton, Nathan, 1843-1906. Nathan Appleton papers, 1850-1904.
- Appling, Austin M. (Austin Maurice), b. 1794. Austin M. Appling account ledgers. 1832-1862.
- Archer, Gleason Leonard, 1880-1966. Gleason Leonard Archer papers.
- Argenteau family. Mercy-Argenteau family papers, 1410-1921.
- Armand Hammer papers, circa 1508-1989.
- Armes, Ethel, 1876-1945. Ethel Armes collection of Lee family papers, 1671-1936.
- Armstrong, Robert Burns, 1903-1955. Robert Burns Armstrong papers.
- Arne Oldberg collection, circa 1887-1962.
- Arnold Gesell papers, 1870-1971.
- Arthur B. Spingarn papers, 1850-1968.
- Arthur, Chester Alan, 1864-1937. Chester Alan Arthur papers. 1874-1937.
- Arthur, Chester Alan, 1901-1972. Chester Alan Arthur papers. 1853-1972.
- Arthur D. Little, Inc. Arthur D. Little, Inc., records.
- Arthur D. Little papers, 1884-1973.
- Arthur family. Arthur family papers, 1817-1972.
- Arthur family papers, 1817-1972.
- Arthur Gleason papers, 1863-1931.
- Arthur J. Morris papers, 1888-1976.
- Arthur Woods papers, 1884-1938.
- Artur Schnabel collection, 1899-1950.
- Artur Schnabel - Mary Virginia Foreman LeGarrec collection, 1893-1996.
- Asaph Hall papers, 1837-1983.
- Associated Press news dispatches, 1915-1930.
- Associated Press. Washington D.C. Bureau. Associated Press news dispatches, 1915-1930.
- Association Against the Prohibition Amendment. Association Against the Prohibition Amendment records, 1917-1933.
- Association Against the Prohibition Amendment records, 1917-1933.
- Association for National Service. Association for National Service records.
- A.T. Mahan papers, 1779-1970.
- Augustus S. Nicholson papers, 1861-1934.
- Austin, Amory. Amory Austin collection relating to heraldry, 1865-1917.
- Austrian, Geoffrey. Geoffrey Austrian papers.
- A.W. Greely papers, 1753-1959.
- Ayestarán, Lauro. Lauro Ayestarán collection, 1830-1966.
B
- Babine, Alexis Vasilevich, 1866-1930. Alexis Vasilevich Babine papers, 1895-1953.
- Bainbridge Colby papers, 1863-1950.
- Baker, Newton Diehl, 1871-1937. Newton Diehl Baker papers, 1896-1962.
- Baker, Ray Stannard, 1870-1946. Ray Stannard Baker papers, 1836-1947.
- Baldorioty de Castro, Román, 1822-1889. Román Baldorioty de Castro papers.
- Baldwin, Evelyn Briggs, 1862-1933. Evelyn Briggs Baldwin papers, 1649-1933.
- Baldwin, Hanson Weightman, 1903-1991. Hanson Weightman Baldwin papers, 1920-1978.
- Ballets russes. Serge Grigoriev/Ballets Russes archive. 1909-2009.
- Bangs, George H. George H. Bangs papers.
- Barbee, David Rankin, 1874-1958. James Dodson and David Rankin Barbee papers. 1784-1953.
- Barbee, James Dodson, 1832-1904. James Dodson Barbee and David Rankin Barbee papers, 1784-1953.
- Barnard, Leon F., 1877-1917. Leon F. Barnard papers, 1901-circa 1993.
- Barrett, John, 1866-1938. John Barrett papers, 1861-1943.
- Barrus, Clara, 1864-1931. Clara Barrus and John Burroughs papers. 1877-1981.
- Bartlett, Suzanne Earle Ogden-Jones Emmons, 1861-1954. Suzanne Earle Ogden-Jones Emmons Bartlett papers. 1897-1913.
- Barton, Clara, 1821-1912. Clara Barton papers, 1805-1958.
- Bassett, John Spencer, 1867-1928. John Spencer Bassett papers, 1770-1978.
- Bassow, Whitman. Whitman Bassow papers, 1920-1990.
- Batchelder, John Davis, 1872-1958. John Davis Batchelder collection of manuscripts, 1537-1944.
- Batchelder, John Davis, 1872-1958. John Davis Batchelder papers. 1910-1944.
- Bates, David Homer, 1843-1926. David Homer Bates papers, 1837-1926.
- Bateson, Gregory, 1904-1980. Gregory Bateson papers.
- Bauer, Harold, 1873-1951. Harold Bauer collection, 1880-1951.
- Beach, Joseph Warren, 1880-1957. Concept of nature in nineteenth-century English poetry. 1936.
- Beach, Joseph Warren, 1880-1957. Joseph Warren Beach papers, 1891-1955.
- Beach, Joseph Warren, 1880-1957. Making of the Auden canon. 1957.
- Beale, Edward Fitzgerald, 1822-1893. Edward Fitzgerald Beale papers.
- Beale family. Beale family papers from the Decatur House, 1794-1957.
- Beale family papers from the Decatur House, 1794-1957.
- Beale, Marie Oge, 1880-1956. Marie Oge Beale diaries.
- Beale, Truxton, 1856-1936. Truxton Beale papers.
- Becker, Florence Deakins, 1878-1969. Florence Deakins Becker papers, 1891-1963.
- Becker, George F. (George Ferdinand), 1847-1919. George F. Becker papers, 1814-1928.
- Beckley, Alfred, 1802-1888. Alfred Beckley papers.
- Beckley family. John James Beckley family papers, 1789-1918.
- Beckley, John James, 1757-1807. John James Beckley family papers, 1789-1918.
- Beerits, Henry C. Henry C. Beerits papers.
- Bela Lyon Pratt papers, 1884-1918.
- Belgian children's letters to President Woodrow Wilson, 1915.
- Belknap, George E. (George Eugene), 1832-1903. George E. Belknap papers, 1857-1903.
- Belknap, Reginald Rowan, 1871-1959. Reginald Rowan Belknap papers, 1784-1929.
- Bell, Alexander Graham, 1847-1922. Alexander Graham Bell family papers, 1834-1974.
- Bell, Alexander Melville, 1819-1905. Alexander Melville Bell papers.
- Bell family. Alexander Graham Bell family papers, 1834-1974.
- Bell, Mabel Gardiner Hubbard, 1857-1923. Mabel Gardiner Hubbard Bell papers.
- Belle Brown collection, 1865-1912.
- Belo, Jane, 1904-1968. Jane Belo papers.
- Bendire, Charles, 1836-1897. Charles Bendire papers, 1874-1919.
- Benedict, Ruth, 1887-1948. Ruth Benedict papers.
- Benjamin Clarke Marsh papers, 1910-1950.
- Benjamin Delahauf Foulois papers, 1898-1966.
- Benjamin, Harold Raymond Wayne, 1893-1969. Harold Raymond Wayne Benjamin papers, 1908-1972.
- Benjamin Harrison papers, 1780-1948.
- Benjamin, Herbert, 1900-1983. Herbert Benjamin papers, 1915-2004.
- Benjamin Holt Ticknor papers, 1595-1935.
- Benjamin V. Cohen papers, 1902-1983.
- Bennett, Frank M. (Frank Marion), 1857-1924. Frank M. Bennett papers, 1893-1909.
- Benney, William A. William A. Benney papers, 1920-1966.
- Benson, William Shepherd, 1855-1932. William Shepherd Benson papers, circa 1791-1952.
- Berge, George W., 1864-1925. George W. Berge business records. 1907.
- Berge, Wendell, 1903-1955. Wendell Berge papers, 1907-1950.
- Berlepsch, Hans Hermann Carl Ludwig, Graf von, 1850-1915. Hans Hermann Carl Ludwig, Graf von Berlepsch, correspondence, 1874-1913.
- Berlin, Irving, 1888-1989. Irving Berlin collection, 1895-1990.
- Berliner, Emile, 1851-1929. Emile Berliner collection, 1871-1965.
- Berliner, Emile, 1851-1929. Emile Berliner papers, 1856-1929.
- Bernays, Edward L., 1891-1995. Edward L. Bernays papers, 1777-1994.
- Berryman, Clifford Kennedy, 1869-1949. Clifford Kennedy Berryman papers, 1814-1965.
- Bess Furman papers, 1728-1967.
- Betances, Ramón Emeterio, 1827-1898. Ramón Emeterio Betances correspondence.
- Beveridge, Albert Jeremiah, 1862-1927. Albert Jeremiah Beveridge papers, 1788-1943.
- Bickerdyke, Mary Ann, 1817-1901. Mary Ann Bickerdyke papers, 1847-1905.
- Biddle, George, 1885-1973. George Biddle papers, 1863-1973.
- Billings, Warren K., 1893-1972. Warren K. Billings papers, 1899-1973.
- Bingham, Theo. A. (Theodore Alfred), 1858-1934. Theo. A. Bingham papers, 1897-1903.
- Blackwell family papers.
- Blandy, William H. P. (William Henry Purnell), 1890-1954. William H.P. Blandy papers, 1913-1977.
- Blatch, Harriot Stanton, 1856-1940. Harriot Stanton Blatch papers, 1907-1915.
- Bledsoe, Albert Taylor, 1809-1877. Albert Taylor Bledsoe papers.
- Bloch collection, 1888-1981.
- Bloch, Ernest, 1880-1959. Eric Johnson collection of Ernest Bloch photographs. 1896-2008.
- Bloch, Ernest, 1880-1959. Ernest Bloch collection.
- Bloch, Ernest, 1880-1959. Ernest Bloch collection, 1888-1981.
- Block, Ralph, 1889-1974. Ralph Block papers, 1872-1971.
- Boardman, Mabel Thorp, 1860-1946. Mabel Thorp Boardman papers, 1853-1945.
- Boas, Franz, 1858-1942. Franz Boas papers, 1878-1943.
- Boas, Franziska, 1902-1988. Franziska Boas collection, 1920-1988.
- Bob Fosse and Gwen Verdon collection, 1920-1991.
- Boggs, Samuel Whittemore, 1889-1954. Samuel Whittemore Boggs papers, 1912-1954.
- Boissevain, Eugen, d. 1949. Eugen Boissevain papers. 1894-1950.
- Bok, Edward William, 1863-1930. Edward William Bok papers, 1880-1926.
- Bolm, Adolf, 1884-1951. Adolph Bolm collection, 1895-1982.
- Bonaparte, Charles J. (Charles Joseph), 1851-1921. Charles J. Bonaparte papers, 1760-1921.
- Bonsal, Stephen, 1865-1951. Stephen Bonsal papers, 1890-1973.
- Booker T. Washington papers, 1853-1946.
- Borah, William Edgar, 1865-1940. William Edgar Borah papers, 1905-1940.
- Borglum, Gutzon, 1867-1941. Gutzon Borglum papers, 1895-1960.
- Borglum, Solon Hannibal, 1868-1922. Solon Hannibal Borglum papers, 1886-1969.
- Boris Brasol papers, 1919-1954.
- Bowker, R. R. (Richard Rogers), 1848-1933. R.R. Bowker papers, 1831-1931.
- Bowles, Edward Lindley, 1897-1990. Edward Lindley Bowles papers, 1869-1990.
- Brand Whitlock papers, circa 1890-1934.
- Brasol, Boris, b. 1885. Boris Brasol papers, 1919-1954.
- Breckinridge, Clifton Rodes, 1846-1932. Clifton Rodes Breckinridge papers.
- Breckinridge, Desha, 1867-1935. Desha Breckinridge papers.
- Breckinridge family. Breckinridge family papers, 1752-1965.
- Breckinridge family papers, 1752-1965.
- Breckinridge, Henry, 1886-1960. Henry Breckinridge papers.
- Breckinridge, John, 1760-1806. John Breckinridge papers.
- Breckinridge, John C. (John Cabell), 1821-1875. John C. Breckinridge papers.
- Breckinridge, Joseph Cabell, 1842-1920. Joseph Cabell Breckinridge papers.
- Breckinridge, Katherine Carson. Katherine Carson Breckinridge papers.
- Breckinridge Long papers, 1486-1948.
- Breckinridge, Madeline McDowell, 1872-1920. Madeline McDowell Breckinridge papers.
- Breckinridge, Robert J. (Robert Jefferson), 1800-1871. Robert J. Breckinridge papers.
- Breckinridge, Sophonisba Preston, 1866-1948. Sophonisba Preston Breckinridge papers.
- Breckinridge, William Campbell Preston, 1837-1904. William Campbell Preston Breckinridge papers.
- Brent, Charles Henry, 1862-1929. Charles Henry Brent papers, 1860-1991.
- Breuer, Josef, 1842-1925. Josef Breuer papers, 1859-1970.
- Brill, A. A. (Abraham Arden), 1874-1948. A.A. Brill papers, 1888-1994.
- Brill, Kittie Rose. Kittie Rose Brill papers.
- Bronson M. Cutting papers, 1890-1950.
- Brooks, Charlotte, 1918-1998. Charlotte Brooks papers. 1831-1999.
- Brooks family. Kendrick-Brooks family papers, 1831-2000.
- Brown, Belle. Belle Brown collection, 1865-1912.
- Brown, Ray Eber, 1892-1962. Ray Eber Brown papers, 1915-1962.
- Browne, Charles Albert, 1870-1947. Charles Albert Browne papers, 1783-1947.
- Brownson, Willard H. (Willard Herbert), 1845-1935. Willard H. Brownson papers, 1859-1932.
- Bruce, Eugene S. (Eugene Sewell), 1860-1920. Eugene S. Bruce papers.
- Brundage, Percival Flack, 1892-1979. Percival Flack Brundage papers, 1918-1979.
- Bryan, William Jennings, 1860-1925. William Jennings Bryan papers, 1877-1940.
- Bryson B. Rash papers, 1918-1992.
- Bryson, Lyman, 1888-1959. Lyman Bryson papers, 1893-1978.
- Buchman, Frank Nathan Daniel, 1878-1961. Frank Nathan Daniel Buchman papers.
- Bucke, Richard Maurice, 1837-1902. Richard Maurice Bucke papers.
- Buell, Raymond Leslie, 1896-1946. Raymond Leslie Buell papers, 1915-1981.
- Bullard, Robert Lee, 1861-1947. Robert Lee Bullard papers, 1881-1955.
- Bunau-Varilla, Philippe, 1859-1940. Philippe Bunau-Varilla papers, 1877-1955.
- Burbank family. Burbank-Van Voorhis families papers, 1814-1913.
- Burbank, Luther, 1849-1926. Luther Burbank papers, 1830-1989.
- Burbank, Sidney, 1807-1882. Sidney Burbank diaries. 1839-1880.
- Burbank, Sullivan, 1776-1862. Sullivan Burbank diary. 1814-1823.
- Burbank-Van Voorhis families papers, 1814-1913.
- Burleson, Albert Sidney, 1863-1937. Albert Sidney Burleson papers, 1845-1943.
- Burlingame, Anson, 1820-1870. Anson Burlingame and Edward L. Burlingame family papers, 1810-1922.
- Burlingame, Edward L. (Edward Livermore), 1848-1922. Anson Burlingame and Edward L. Burlingame family papers. 1810-1922.
- Burlingame family. Anson Burlingame and Edward L. Burlingame family papers, 1810-1922.
- Burlingame, Jane Cornelia Livermore. Jane Cornelia Livermore Burlingame papers.
- Burnett, Edmund Cody, 1864-1949. Edmund Cody Burnett papers, 1765-1967.
- Burnett, Frances Hawks Cameron. Frances Hawks Cameron Burnett papers, 1818-1936.
- Burroughs, John, 1837-1921. Clara Barrus and John Burroughs papers. 1877-1981.
- Burton Egbert Stevenson papers, 1900-1951.
- Burton Kline papers, 1896-1954.
- Burton Norvell Harrison family papers, 1812-1926.
C
- C. Chaillé-Long papers, 1809-1918.
- Caleb Henry Carlton papers, 1831-1954.
- Callan, John Lansing, 1886-1958. John Lansing Callan papers, 1907-1956.
- Calvin Coolidge papers, 1915-1932.
- Cameron family. Miles-Cameron families correspondence, 1661-1956.
- Campbell family. Campbell-Preston-Floyd families papers, 1741-1931.
- Campbell, George A. (George Ashley), 1870-1954. George A. Campbell papers.
- Campbell-Preston-Floyd families papers, 1741-1931.
- Canal Zone Library-Museum. Panama Collection, 1804-1977.
- Capek, Thomas, 1861-1950. Thomas Capek collection of materials relating to Czechoslovakia and Czech Americans, 1619-1953.
- Caperton, William Banks, 1855-1941. William Banks Caperton papers, 1873-1939.
- Cardozo family. Francis Lewis Cardozo family papers, 1864-1968.
- Cardozo, Francis Lewis, 1836-1903. Francis Lewis Cardozo family papers, 1864-1968.
- Carl Brent Swisher collection of research materials relating to Roger B. Taney, 1836-1962.
- Carl Koller papers, 1866-1988.
- Carl Schurz papers, 1842-1983.
- Carlton, Caleb Henry, 1836-1923. Caleb Henry Carlton papers, 1831-1954.
- Carman, Ezra Ayers, 1834-1909. Ezra Ayers Carman papers, 1861-1909.
- Carnegie, Andrew, 1835-1919. Andrew Carnegie papers, 1803-1935.
- Carpenter collection, 1891-1961.
- Carpenter, Frances, 1890-1972. Frances Carpenter collection relating to Frank G. Carpenter, 1875-1960.
- Carpenter, Frank G. (Frank George), 1855-1924. Frances Carpenter collection relating to Frank G. Carpenter, 1875-1960.
- Carpenter, Fred W., 1873 or 4-1957 Fred W. Carpenter papers.
- Carpenter, John Alden, 1876-1951. John Alden Carpenter collection, 1891-1961.
- Carr, Wilbur J. (Wilbur John), 1870-1942. Wilbur J. Carr papers, 1892-1942.
- Carrère, John Merven, 1858-1911. John Merven Carrère papers, 1894-1911.
- Carrie Chapman Catt papers, 1848-1950.
- Carrie Jacobs-Bond collection, circa 1896-circa 1944.
- Carroll, Raymond G., 1876?-1943. Raymond G. Carroll papers, 1905-1944.
- Carter Godwin Woodson papers, 1736-1974.
- Carter, Lucy Grymes Lee, 1786-1860. Lucy Grymes Lee Carter papers.
- Carter, Thomas Henry, 1854-1911. Thomas Henry Carter papers, 1883-1917.
- Casey, Silas, 1841-1913. Silas Casey papers, 1771-1941.
- Cass Gilbert papers, 1841-1961.
- Castelnuovo-Tedesco, Mario, 1895-1968. Mario Castelnuovo-Tedesco papers, 1822-1998.
- Castle family. Henry Northrup Castle family papers, 1394-1920.
- Catt, Carrie Chapman, 1859-1947. Carrie Chapman Catt papers, 1848-1950.
- Cattell, James McKeen, 1860-1944. James McKeen Cattell papers, 1835-1948.
- Cerise C. Jack papers relating to the Sacco and Vanzetti case, circa 1921-1999.
- Chaillé-Long, C. (Charles), 1842-1917. C. Chaillé-Long papers, 1809-1918.
- Chamberlain, Eugene Tyler, 1856-1929. Eugene Tyler Chamberlain collection relating to French orphans of World War I, 1916-1927.
- Chamberlain, Joshua Lawrence, 1828-1914. Joshua Lawrence Chamberlain papers, 1775-1913.
- Chambers, Washington Irving, 1856-1934. Washington Irving Chambers papers, 1871-1943.
- Chandler P. Anderson papers, 1894-1953.
- Chandler, William E. (William Eaton), 1835-1917. William E. Chandler papers, 1863-1917.
- Chanute, Octave, 1832-1910. Octave Chanute papers, 1807-1955.
- Charles Albert Browne papers, 1783-1947.
- Charles B. Elliott papers, 1910-1912.
- Charles Bendire papers, 1874-1919.
- Charles Bowdoin Fillebrown papers, 1879-1928.
- Charles Evans Hughes papers, 1836-1950.
- Charles Follen McKim papers, 1838-1929.
- Charles Hambitzer music manuscripts, circa 1910-1918.
- Charles Henry Brent papers, 1860-1991.
- Charles Henry Fromuth papers, 1884-1937.
- Charles J. Bonaparte papers, 1760-1921.
- Charles Julius Allen and Grace Elizabeth Allen papers, 1865-1976.
- Charles Maass papers, 1912-1924.
- Charles Mason Remey family papers, 1778-1949.
- Charles Moore papers, 1848-1944.
- Charles N. Elliot collection, 1873-1951.
- Charles O'Neil papers, 1833-1927.
- Charles Perley Smith papers, 1920-1946.
- Charles Russell Train papers, 1898-1967.
- Charles S. Hamlin papers, 1869-1968.
- Charles S. Sperry papers, 1862-1912.
- Charles Tournemire collection, circa 1868-1962.
- Charles W. Hack papers, circa 1800-1926.
- Charles W. Sirch papers, 1878-1935.
- Charles Warren papers, 1874-1954.
- Charles Withers papers, 1917-1942.
- Charlotte Everett Hopkins collection of National Civic Federation. Woman's Department. District of Columbia Section records, 1900-1926.
- Chase, Emma Lester, b. 1885. Emma Lester Chase papers.
- Chase, Lewis Nathaniel, 1873-1937. Lewis Nathaniel Chase papers, 1836-1947.
- Chase, Pearl-Adell, 1872-1955. Pearl-Adell Chase papers.
- Chauncy, Elnathan, 1724-1796. Elnathan Chauncy sermons.
- Cheney, John Vance, 1848-1922. John Vance Cheney papers, 1847-1927.
- Chester, Colby Mitchell, 1844-1932. Colby Mitchell Chester papers, 1913-1928.
- Child, Warren G. (Warren Gerald), 1883-1938. Warren G. Child papers, 1907-1942.
- Choate, Joseph Hodges, 1832-1917. Joseph Hodges Choate papers, 1745-1929.
- Christian A. Fleetwood papers, 1797-1945.
- Christiancy and Pickett families' papers, 1835-1998.
- Christiancy family. Christiancy and Pickett families' papers, 1835-1998.
- Christiancy, Henry Clay, 1841-1925. Henry Clay Christiancy papers.
- Christiancy, James Isaac, 1843-1899. James Isaac Christiancy papers.
- Clapp, Asa, 1762-1848. Asa Clapp papers.
- Clapp, Asa W. H. (Asa William Henry), 1805-1891. Asa William Henry Clapp papers.
- Clapp, Charles Q., 1799-1868. Charles Q. Clapp papers.
- Clapp family. Clapp family papers, 1789-1935.
- Clapp family papers, 1789-1935.
- Clapp, Mary Jane Emerson, 1835-1922. Mary Jane Emerson Clapp papers.
- Clapper, Raymond, 1892-1944. Raymond Clapper papers, 1908-1962.
- Clara Barrus and John Burroughs papers, 1877-1981.
- Clara Barton papers, 1805-1958.
- Clarence Darrow papers, 1894-1941.
- Clark, John T., 1883-1949. John T. Clark papers. 1921-1923.
- Clark, Victor S. (Victor Selden), 1868-1946. Victor S. Clark papers, 1827-1944.
- Clarke-Smith, Linda. Rebekah Crawford and Linda Clarke-Smith papers. 1715-1929.
- Cleland, T. M. (Thomas Maitland), 1880-1964. T.M. Cleland papers, 1880-1964.
- Cleveland Abbe papers, 1850-1954.
- Cleveland, Grover, 1837-1908. Grover Cleveland papers, 1743-1945.
- Clifford Kennedy Berryman papers, 1814-1965.
- Cobb, Edith, 1895-1977. Edith Cobb papers.
- Coblentz, William W. (William Weber), 1873-1962. William W. Coblentz papers, 1883-1960.
- Coggeshall, Joseph. Joseph Coggeshall account book. 1771-1786.
- Cohen, Benjamin V. Benjamin V. Cohen papers, 1902-1983.
- Colbert, John W. (John William), 1880-1965. John W. Colbert papers, 1895-1966.
- Colby, Bainbridge, 1869-1950. Bainbridge Colby papers, 1863-1950.
- Colby Mitchell Chester papers, 1913-1928.
- Collins, Ross A. (Ross Alexander), 1880-1968. Ross A. Collins papers, 1906-1967.
- Colson, Lewis Whitfield, 1880-1961. Lewis Whitfield Colson papers, 1894-1950.
- Comer, Lucretia Garfield, 1894-1968. Lucretia Garfield Comer papers.
- Conger, Edwin H. (Edwin Hurd), 1843-1907. Edwin H. Conger papers.
- Connor, Jeannette Thurber, d. 1927. Jeannette Thurber Connor collection of Floridiana, 1570-1927.
- Cook, Frederick Albert, 1865-1940. Frederick Albert Cook papers, 1881-1977.
- Coolidge, Calvin, 1872-1933. Calvin Coolidge papers, 1915-1932.
- Coolidge, Elizabeth Sprague, 1864-1953. Correspondence from the Elizabeth Sprague Coolidge Foundation collection, 1894-1953.
- Cooper Curtice papers, 1822-1953.
- Copher, Edith Hulsizer, 1891-1935. Edith Hulsizer Copher papers.
- Copland, Aaron, 1900-1990. Aaron Copland collection, 1841-1991.
- Copland collection, 1841-1991.
- Corbin, Hannah Lee, 1728-1782. Hannah Lee Corbin papers.
- Corbin, Henry Clark, 1842-1909. Henry Clark Corbin papers, 1864-1980.
- Corey, Herbert, 1872-1954. Herbert Corey papers, 1847-1954.
- Cornelia Bryce Pinchot papers, 1899-1960.
- Correspondence from the Elizabeth Sprague Coolidge Foundation collection, 1894-1953.
- Cortelyou, George B. (George Bruce), 1862-1940. George B. Cortelyou papers, 1871-1948.
- Cottrell, Frederick Gardner, 1877-1948. Frederick Gardner Cottrell papers, 1896-1951.
- Council of National Defense (Washington, D.C.). Woman's Committee. Council of National Defense (Washington, D.C.). Woman's Committee records. 1917-1918.
- Couzens, James, 1872-1936. James Couzens papers, 1903-1940.
- Craven, Thomas T. (Thomas Tingey), 1873-1950. Thomas T. Craven papers, 1842-1969.
- Crawford, Rebekah, 1845-1934. Rebekah Crawford and Linda Clarke-Smith papers, 1715-1929.
- Crawford, Richard, 1738-1798. Richard Crawford account and ledger books. 1753-1830.
- Creel, George, 1876-1953. George Creel papers, 1857-1953.
- Cresson, Margaret French, 1889-1973. Margaret French Cresson papers. circa 1915-1962.
- Crosby, Oscar Terry, 1861-1947. Oscar Terry Crosby papers, 1878-1947.
- Cuban Educational Association of the United States of America. Cuban Educational Association of the United States of America records, 1897-1954.
- Cuban Educational Association of the United States of America records, 1897-1954.
- Culbertson, William Smith, 1884-1966. William Smith Culbertson papers, 1897-1965.
- Cummings, Harry S., 1866-1917. Harry S. Cummings papers, 1890-1986.
- Curtice, Cooper, 1856-1939. Cooper Curtice papers, 1822-1953.
- Curtis, Joseph O. Joseph O. Curtis papers.
- Curtis L. Malaney papers, 1923-1989.
- Cutting, Bronson M., 1888-1935. Bronson M. Cutting papers, 1890-1950.
- Cyrus Robinson Miller papers, 1897-1940.
D
- D. Heywood Hardy papers, 1913-1924.
- Daley, William L. William L. Daley collection relating to Billy Sunday. 1914-1925.
- Damrosch, Frank, 1859-1937. Damrosch - Tee Van Collection. 1856-1969.
- Damrosch, Leopold, 1832-1885. Damrosch - Tee Van collection.
- Damrosch, Leopold, 1832-1885. Damrosch - Tee Van collection, 1856-1969.
- Damrosch, Leopold, 1832-1885. Mannes - Damrosch collection. 1948-1986.
- Damrosch - Tee Van collection, 1856-1969.
- Daniel Augustus Tompkins papers, 1887-1920.
- Daniel Chester French papers, circa 1848-1968.
- Daniel Edgar Sickles papers, 1821-1918.
- Daniel Scott Lamont papers, 1853-1928.
- Daniels, Josephus, 1862-1948. Josephus Daniels papers, 1829-1948.
- Danilova, Alexandra, 1907-1997. Alexandra Danilova collection, 1920-2000.
- Danny Kaye and Sylvia Fine collection, 1893-1988.
- Darrow, Clarence, 1857-1938. Clarence Darrow papers, 1894-1941.
- David Homer Bates papers, 1837-1926.
- David Maydole Matteson papers, 1876-1937.
- Davies, Joseph Edward. Joseph Edward Davies papers, 1860-1958.
- Davis, J. C. Bancroft (John Chandler Bancroft), 1822-1907. J.C. Bancroft Davis papers, 1849-1902.
- Davis, James J. (James John), 1873-1947. James J. Davis papers, 1895-1946.
- Davis, Jefferson, 1808-1889. Jefferson Davis papers, 1795-1913.
- Day, William R. (William Rufus), 1849-1923. William R. Day papers, 1820-1923.
- De Forest, Lee, 1873-1961. Lee De Forest papers, 1884-1955.
- Decatur, Stephen, 1779-1820. Stephen Decatur papers.
- Deisch, Noel, 1892-1978. Noel Deisch papers, 1910-1937.
- Demens, Peter A., 1850-1919. Peter A. Demens papers, 1880-2000.
- Denby family. Denby family papers, 1850-1911.
- Denby family papers, 1850-1911.
- Dennett, Tyler, 1883-1949. Tyler Dennett collection relating to John Hay, 1861-1937.
- Desha, Mary, 1850-1911. Mary Desha papers.
- Dewey, George, 1837-1917. George Dewey papers, 1805-1949.
- Dewey, Mildred McLean Hazen, 1850-1931. Mildred McLean Hazen Dewey papers.
- Deyo, Morton L. (Morton Lyndholm), 1887-1973. Morton L. Deyo papers, 1911-1981.
- D.H. Lawrence correspondence, notes, and photographs, 1921-1930.
- Diaghilev, Serge, 1872-1929. Serge Diaghilev/Serge Lifar collection, 1750-1950.
- Dickerson, Edward E., 1831-1914. Edward E. Dickerson papers, 1861-1991.
- Dickerson, Wilton H. Wilton H. Dickerson papers.
- Dickinson, Anna E. (Anna Elizabeth), 1842-1932. Anna E. Dickinson papers, 1859-1951.
- Dike, Samuel W. (Samuel Warren), 1839-1913. Samuel W. Dike papers, 1870-1913.
- District of Columbia Woman Suffrage Association. District of Columbia Woman Suffrage Association records.
- Dixon, Frederick, d. 1923. Frederick Dixon papers, 1897-1923.
- Dixon Jones, Mary Amanda. Mary Amanda Dixon Jones papers, 1839-1925.
- Dmitriĭ Antonovich Volkogonov papers, 1887-1995.
- Dock, Mira Lloyd, 1853-1945. Mira Lloyd Dock papers, 1814-1951.
- Dodd, William Edward, 1869-1940. William Edward Dodd papers, 1895-1955.
- Donaldson, David K. David K. Donaldson papers.
- Donaldson family. Pike-McConnell-Donaldson family papers, 1770-1967.
- Donaldson, Lavinia Pike McConnell. Lavinia Pike McConnell Donaldson papers.
- Doriot, Georges F. (Georges Frederic), 1899-1987. Georges F. Doriot papers, 1917-1985.
- Dorn, Edward John, 1854-1937. Edward John Dorn papers, 1868-1936.
- Dorothea Dix Lawrence collection, 1856-1980.
- Dorsett, Edward Lee, 1883- Edward Lee Dorsett naval historical collection, 1814-1926.
- Dorsey William Hyde papers, 1757-1955.
- Doubleday and Company, inc. Ken McCormick collection of Doubleday and Company, inc., records. 1882-1992.
- Douglas, William O. (William Orville), 1898-1980. William O. Douglas papers, 1801-1980.
- Douglass, Elisha P. Anglo-Russian Friction, 1907-1911, and the Morgan Shuster Affair : unpublished thesis.
- Doysié, Abel, 1886-1973. Abel Doysié papers, 1910-1967.
- Dudley Wright Knox papers, circa 1864-1950.
- Duke, Vernon, 1903-1969. Vernon Duke collection, 1918-1968.
- Duncan Emrich autograph album collection, 1843-1956.
- Dunn, Lucius C. (Lucius Claude), 1885-1963. Lucius C. Dunn papers, 1902-1957.
- Dunston, Gatewood W. Gatewood W. Dunston collection relating to William S. Hart, 1914-1955.
- DuPont, Jean Kane Foulke, 1891-1975. Jean Kane Foulke DuPont papers. 1937-1946.
- Dupuis-Delcourt, 1802-1864. Tissandier collection on the history of aeronautics. 1539-1929.
E
- E. Alexander Powell papers, 1893-1957.
- Early, Jubal Anderson, 1816-1894. Jubal Anderson Early papers, 1829-1930.
- Edgar Alexander Mearns papers, 1864-1918.
- Edgar Stanton Maclay papers, 1782-circa 1918.
- Edison sheet music collection, 1830-1958.
- Edith Benham Helm papers, 1915-1961.
- Edith Jacobson papers, 1922-1977.
- Edmund Clarence Stedman papers, 1871-1923.
- Edmund Cody Burnett papers, 1765-1967.
- Edna St. Vincent Millay papers, 1832-1992.
- Edoardo Weiss papers, 1919-1970.
- Edward E. Dickerson papers, 1861-1991.
- Edward Everett Hayden family papers, 1817-1963.
- Edward Goodrich Acheson papers, 1872-1968.
- Edward John Dorn papers, 1868-1936.
- Edward L. Bernays papers, 1777-1994.
- Edward L. Thorndike papers, 1900-1938.
- Edward Lee Dorsett naval historical collection, 1814-1926.
- Edward Lindley Bowles papers, 1869-1990.
- Edward MacDowell Association. Edward MacDowell Association records.
- Edward Nealy Kellogg and Edward Stanley Kellogg papers, 1858-1937.
- Edward Otto Tabor papers, 1918-1948.
- Edward Settle Godfrey papers, 1863-1933.
- Edward William Bok papers, 1880-1926.
- Edward Willis papers, 1854-1906.
- Edwin Arlington Robinson papers, 1913-1940.
- Edwin Markham papers, circa 1893-1937.
- Einstein, Albert, 1879-1955. Albert Einstein papers, 1916-1953.
- Elder, Abram P. T. (Abram Peter Turner). Abram P.T. Elder papers, 1890-1916.
- Elihu Root papers, 1863-1937.
- Elijah Walker Halford papers, 1848-1938.
- Elizabeth Cady Stanton papers, 1814-1946.
- Elizabeth Sprague Coolidge Foundation collection, correspondence from the collection, 1894-1953.
- Elliot, Charles N. (Charles Nathan), b. 1873. Charles N. Elliot collection, 1873-1951.
- Elliot Snow papers, 1790-1942.
- Elliott, Charles B. (Charles Burke), 1861-1935. Charles B. Elliott papers, 1910-1912.
- Ellsworth family. Oliver Ellsworth family papers, 1762-1907.
- Ellsworth, Oliver, 1745-1807. Oliver Ellsworth family papers, 1762-1907.
- Ellyson, Theodore Gordon, 1885-1928. Theodore Gordon Ellyson papers, 1912-1951.
- Elmo N. Pickerill papers, 1910-1975.
- Emerson, Ralph Waldo, 1803-1882. Ralph Waldo Emerson journal.
- Emile Berliner collection, 1871-1965.
- Emily A. Stewart collection of Elihu Root material, 1885-1959.
- Emmons, Samuel Franklin, 1841-1911. Samuel Franklin Emmons papers, 1725-1914.
- Emory, William H. (William Hemsley), 1846-1917. William H. Emory papers, 1877-1948.
- Emrich, Duncan, 1908-1977. Duncan Emrich autograph album collection, 1843-1956.
- Eno, Amos R. (Amos Richard), 1810-1898. Amos R. Eno papers.
- Eric Johnson collection of Ernest Bloch photographs, 1896-2008.
- Ernest Bloch collection, 1888-1981.
- Erwin F. Smith papers, 1876-1927.
- Ethel Armes collection of Lee family papers, 1671-1936.
- Eugene Tyler Chamberlain collection relating to French orphans of World War I, 1916-1927.
- Eugenio María de Hostos and Eugenio Carlos de Hostos papers, 1865-1990.
- Eva Le Gallienne papers, 1875-1993.
- Evelyn Briggs Baldwin papers, 1649-1933.
- Evelyn Wadsworth Symington collection of John Hay material, 1864-1905.
- Everett, Alexander Hill, 1790-1847. Alexander Hill Everett papers.
- Everett Sanders papers, 1913-1950.
- Everett Strait Hughes papers, 1903-1975.
- Ezra Ayers Carman papers, 1861-1909.
F
- F. Lamson-Scribner papers, 1885-1938.
- Fairchild, Marian, 1880-1962. Marian Fairchild papers.
- Farley, James A. (James Aloysius), 1888-1976. James A. Farley papers, 1790-1976.
- Farrar, Geraldine, 1882-1967. Geraldine Farrar collection, 1895-1943.
- Feamster family. Feamster family papers. 1794-1967.
- Feamster family papers, 1794-1967.
- Federn, Paul. Paul Federn papers, 1864-1975.
- Feinberg, Charles E., 1899- Charles E. Feinberg papers.
- Feinberg, Charles E., 1899- Walt Whitman papers in the Charles E. Feinberg collection, 1763-1985.
- Felix Frankfurter papers, 1846-1966.
- Fernández Carballido, Rufo Manuel, 1790-1855. Rufo Manuel Fernández Carballido papers.
- Ficher, Jacobo, 1896-1978. Jacobo Ficher collection, 1864-1997.
- Field family. Field-Osgood family papers, 1702-1938.
- Field-Osgood family papers, 1702-1938.
- Field, Susan K. Osgood. Susan K. Osgood Field papers.
- Fillebrown, Charles Bowdoin, 1842-1917. Charles Bowdoin Fillebrown papers, 1879-1928.
- Fine, Sylvia. Danny Kaye and Sylvia Fine collection. 1893-1988.
- Fisher, A. K. (Albert Kenrick), 1856-1948. A.K. Fisher papers, 1827-1957.
- Fisher, Anne B. (Anne Benson), 1898- Anne B. Fisher papers.
- Fisher, George P. (George Purnell), 1817-1899. George P. Fisher papers, 1772-1905.
- Fisher, Walter K. (Walter Kenrick), 1878-1953. Walter K. Fisher papers.
- Fiske, Asa Severance, 1833-1925. Asa Severance Fiske papers.
- Fiske, Elizabeth Worthington Hand, 1835-1919. Elizabeth Worthington Hand Fiske papers.
- Fiske family. John Aldrich Stephenson collection of the Hand, Fiske, and Aldrich families papers. 1745-1966.
- Fiske, Harrison Grey, 1861-1942. Minnie Maddern Fiske and Harrison Grey Fiske papers, 1818-1955.
- Fiske, Minnie Maddern, 1865-1932. Minnie Maddern Fiske and Harrison Grey Fiske papers, 1818-1955.
- Fiske, Samuel Wheelock, 1828-1864. Samuel Wheelock Fiske papers.
- F.L. and J.C. Olmsted (Firm : 1884-1889). F.L. and J.C. Olmsted (Firm : 1884-1889) records.
- F.L. and J.C. Olmsted (Firm : 1897-1898). F.L. and J.C. Olmsted (Firm : 1897-1898) records. (2)
- F.L. Olmsted and Company. F.L. Olmsted and Company records.
- Flannery, John Spalding, 1870-1954. John Spalding Flannery papers, 1902-1953.
- Flaubert, Gustave, 1821-1880. Salammbo.
- Fleetwood, Christian A. (Christian Abraham), 1840-1914. Christian A. Fleetwood papers, 1797-1945.
- Fleetwood, Sara Iredell Sara Iredell Fleetwood papers.
- Flexner, Abraham, 1866-1959. Abraham Flexner papers, 1865-1989.
- Fliess, Conrad. Reminiscences (undated).
- Fliess, Wilhelm, 1858-1928. Wilhelm Fliess papers, 1894-1929.
- Florence Deakins Becker papers, 1891-1963.
- Florence Ellinwood Allen papers, 1907-1965.
- Florence Jaffray Hurst Harriman papers, 1857-1982.
- Florence Parr-Gere papers, 1856-1964.
- Floyd family. Campbell-Preston-Floyd families papers, 1741-1931.
- Foerstel, Lenora, 1929- Lenora Foerstel papers.
- Foraker, Joseph Benson, 1846-1917. Joseph Benson Foraker papers, 1884-1916.
- Forbes, W. Cameron (William Cameron), 1870-1959. W. Cameron Forbes papers, 1904-1946.
- Forster, Rudolph, 1872-1943. Rudolph Forster papers, 1898-1943.
- Fortune, Reo, 1903- Reo Fortune papers.
- Fosse, Bob, 1927-1987. Bob Fosse and Gwen Verdon collection, 1920-1991.
- Foulke, William Dudley, 1848-1935. William Dudley Foulke papers, circa 1470-1952.
- Foulois, Benjamin Delahauf, 1879-1967. Benjamin Delahauf Foulois papers, 1898-1966.
- Fowler, Joseph Smith, 1820-1902. Joseph Smith Fowler papers, 1863-1903.
- Fowler, William Chauncey, 1793-1881. William Chauncey Fowler papers.
- Fox, Josiah, 1763-1847. Josiah Fox papers.
- Frances Benjamin Johnston papers, 1855-1956.
- Frances Carpenter collection relating to Frank G. Carpenter, 1875-1960.
- Frances G. Wickes papers, 1896-1996.
- Frances Hawks Cameron Burnett papers, 1818-1936.
- Francis Bowes Sayre papers, 1861-1967.
- Francis Bowler Keene papers, 1856-1975.
- Francis Lewis Cardozo family papers, 1864-1968.
- Frank Knox papers, 1898-1954.
- Frank Lloyd Wright papers, 1894-1958.
- Frank M. Bennett papers, 1893-1909.
- Frank Maloy Anderson papers, circa 1895-circa 1961.
- Frankfurter, Felix, 1882-1965. Felix Frankfurter papers, 1846-1966.
- Franz Boas papers, 1878-1943.
- Franziska Boas collection, 1920-1988.
- Fred Kenelm Nielsen papers, 1881-1961.
- Frederic Eugene Ives and Herbert Eugene Ives papers, 1869-1957.
- Frederic William Wile scrapbooks, 1898-1941.
- Frederick Albert Cook papers, 1881-1977.
- Frederick Cecil Horner papers, 1917-1960.
- Frederick Dixon papers, 1897-1923.
- Frederick Gardner Cottrell papers, 1896-1951.
- Frederick Joseph Horne papers, 1893-1967.
- Frederick Joseph Libby papers, 1846-1973.
- Frederick Law Olmsted (Firm). Frederick Law Olmsted (Firm) records.
- Frederick Law Olmsted papers, 1777-1952.
- French, Daniel Chester, 1850-1931. Daniel Chester French papers, circa 1848-1968.
- Freud, Alexander, 1866-1943. Alexander Freud and Sophie Schreiber Freud papers, 1872-1965.
- Freud, Eva Mathilde, 1924-1944. Eva Mathilde Freud papers. 1924-1945.
- Freud, Henny Fuchs, 1892-1971. Oliver and Henny Fuchs Freud papers. 1821-1968.
- Freud, Oliver, 1891-1969. Oliver Freud and Henny Fuchs Freud papers, 1821-1993.
- Freud, Sigmund, 1856-1939. Sigmund Freud papers, circa 6th century B.C.-1998.
- Freud, Sophie Schreiber, 1878-ca. 1965. Alexander Freud and Sophie Schreiber Freud papers. 1872-1965.
- Frič, Alberto Vojtěch, 1882-1944. Alberto Vojtěch Frič papers.
- Fritz Kreisler collection, 1845-1969.
- Fromuth, Charles Henry, 1861-1937. Charles Henry Fromuth papers, 1884-1937.
- Frost, Robert, 1874-1963. Untermeyer-Frost collection. 1913-1964.
- Fullam, William F. (William Freeland), 1855-1926. William F. Fullam papers, 1873-1942.
- Fuller, Melville Weston, 1833-1910. Melville Weston Fuller papers, 1794-1949.
- Furer, Julius Augustus, 1880-1963. Julius Augustus Furer papers, 1910-1962.
- Furman, Bess, 1894-1969. Bess Furman papers, 1728-1967.
- Furman, Lucile N., 1896-1961. Lucile N. Furman papers.
G
- G. Bromley Oxnam papers, 1823-1963.
- Gage, Lyman J. (Lyman Judson), 1836-1927. Lyman J. Gage correspondence, 1897-1906.
- Gallaudet, Edward Miner, 1837-1917. T.H. Gallaudet and Edward Miner Gallaudet papers. 1806-1958.
- Gallaudet, T. H. (Thomas Hopkins), 1787-1851. T.H. Gallaudet and Edward Miner Gallaudet papers, 1806-1958.
- Garfield, Abram, b. 1872 Abram Garfield papers.
- Garfield, Harry Augustus, 1863-1942. Harry Augustus Garfield papers, 1855-1961.
- Garfield, Helen Newell, 1866-1930. Helen Newell Garfield papers.
- Garfield, Irvin McDowell, 1870-1951 Irvin McDowell papers.
- Garfield, James A. (James Abram), 1831-1881. James A. Garfield papers.
- Garfield, James Rudolph, 1865-1950. James Rudolph Garfield papers, 1879-1950.
- Garfield, Lucretia Rudolph, 1832-1918. Lucretia Rudolph Garfield papers.
- Garfield, Lucretia Rudolph, 1832-1918. Lucretia Rudolph Garfield papers, 1807-1958.
- Garfinckel's (Department store). Garfinckel's Department Store records, 1919-1981.
- Garfinckel's Department Store records, 1919-1981.
- Garrett, Naomi Mills. Naomi Mills Garrett papers.
- Gatewood W. Dunston collection relating to William S. Hart, 1914-1955.
- Georg Martin Wunderlich papers, 1897-1951.
- George and Böske Antheil papers, 1875-1984.
- George and Ira Gershwin collection, 1895-2008.
- George Antheil collection, 1875-1984.
- George Antheil collection, 1919-1931.
- George Antheil collection, 1921-1940.
- George Antheil correspondence to Stanley Hart, 1919-1931.
- George Antheil correspondence with Mary Louise Curtis Bok, 1921-1940.
- George B. Cortelyou papers, 1871-1948.
- George Biddle papers, 1863-1973.
- George Creel papers, 1857-1953.
- George D. Murray papers, 1916-1956.
- George Dewey papers, 1805-1949.
- George E. Belknap papers, 1857-1903.
- George F. Becker papers, 1814-1928.
- George Foster Peabody papers, 1894-1937.
- George Hodges collection, circa 1790-circa 1909.
- George Middleton papers, 1872-1970.
- George Montfort Gilchrist family papers, 1854-1921.
- George P. Fisher papers, 1772-1905.
- George P. Merrill correspondence and autographs, 1803-1926.
- George Peabody Wetmore papers, 1885-1916.
- George S. Kaufman papers, 1911-1941.
- George S. Patton papers, 1807-1979.
- George Sabin Gibbs papers, 1896-1947.
- George Sutherland papers, 1850-1944.
- George Van Deurs papers, 1851-1982.
- George Van Horn Moseley papers, 1855-1960.
- Georges F. Doriot papers, 1917-1985.
- Geraghty, Tom J. Tom J. Geraghty papers, 1923-1965.
- Geraldine Farrar collection, 1895-1943.
- German captured documents collection, 1766-1945.
- Gershwin, George, 1898-1937. George and Ira Gershwin collection, 1895-2008.
- Gershwin, George, 1898-1937. Porgy and Bess.
- Gershwin, George, 1898-1937. Selections.
- Gershwin, George, 1898-1937. Selections; arr.
- Gershwin, Ira, 1896-1983. George and Ira Gershwin collection. 1895-2008.
- Gesell, Arnold, 1880-1961. Arnold Gesell papers, 1870-1971.
- Getty family. Gibson-Getty-McClure families papers, 1777-1926.
- Getty, George W. George W. Getty papers. 1847-1913.
- Gibbs, George Sabin, 1875-1947. George Sabin Gibbs papers, 1896-1947.
- Gibson family. Gibson-Getty-McClure families papers, 1777-1926.
- Gibson-Getty-McClure families papers, 1777-1926.
- Giffard, Henri, 1825-1882. Henri Giffard papers, 1852-1910.
- Gifford Pinchot papers, 1770-1972.
- Gilbert, Cass, 1859-1934. Cass Gilbert papers, 1841-1961.
- Gilbert, Cass, b. 1894. Cass Gilbert letterbooks. 1936-1941.
- Gilbert Jonas Company. Gilbert Jonas Company records. 1964-1995.
- Gilbert M. Hitchcock papers, 1910-1935.
- Gilchrist family. George Montfort Gilchrist family papers, 1854-1921.
- Gilchrist, George Montfort. George Montfort Gilchrist family papers, 1854-1921.
- Gish, Lillian, 1893-1993. Lillian Gish papers, 1829-1978.
- Gleason, Arthur, 1878-1923. Arthur Gleason papers, 1863-1931.
- Gleaves, Albert, 1858-1937. Albert Gleaves papers, 1803-1946.
- Glenn Dillard Gunn collection, 1874-1961.
- Gluck, Alma, 1884-1938. Alma Gluck scrapbooks and other materials, 1902-1940.
- Godfrey, Edward Settle, 1843-1932. Edward Settle Godfrey papers, 1863-1933.
- Gold, Julius, 1884-1969. Julius Gold collection, 1858-1924.
- Goodell, William, 1792-1867. William Goodell papers, 1818-1917.
- Gould, Alice Bache, 1868-1953. Alice Bache Gould papers.
- Graf, Rosa Freud, 1860-ca. 1942. Rosa Freud Graf papers, 1879-1942.
- Grant Richards collection of A.E. Housman material, 1898-1947.
- Greely, A. W. (Adolphus Washington), 1844-1935. A.W. Greely papers, 1753-1959.
- Greely, Henrietta Hudson Cruger Nesmith. Henrietta Hudson Cruger Nesmith Greely papers. 1878-1918.
- Greene, Paulette. Paulette Greene papers, 1920-1998.
- Greenslade, John Wills, 1880-1950. John Wills Greenslade papers, 1847-1961.
- Gregg, Morris E. Morris E. Gregg papers.
- Gregory, Thomas Watt, 1861-1933. Thomas Watt Gregory papers, 1896-1933.
- Grey, Zane, 1872-1939. Zane Grey papers, 1912-1939.
- Grigorʹev, S. L. (Sergeĭ Leonidovich), 1883-1968. Diaghilev ballet, 1909-1929.
- Grigorʹev, S. L. (Sergeĭ Leonidovich), 1883-1968. Serge Grigoriev/Ballets Russes archive, 1909-2009.
- Grosvenor, Edwin A. (Edwin Augustus), 1845-1936. Edwin A. Grosvenor papers.
- Grosvenor, Edwin Prescott, 1875-1930. Edwin Prescott Grosvenor papers.
- Grosvenor, Elsie May, 1878-1964. Elsie May Grosvenor papers.
- Grosvenor family. Grosvenor family papers, 1827-1981.
- Grosvenor family papers, 1827-1981.
- Grosvenor, Gilbert Hovey, 1875-1966. Gilbert Hovey Grosvenor papers.
- Grosvenor, Lilian Waters, 1852-1931. Lilian Waters Grosvenor papers.
- Grosvenor, Melville Bell, 1901-1982. Melville Bell Grosvenor papers.
- Grover Cleveland Loening papers, 1900-1975.
- Grover Cleveland papers, 1743-1945.
- Gumm, H. Harold. Von Tilzer / Gumm collection. 1878-1959.
- Gunn, Glenn Dillard, 1874-1963. Glenn Dillard Gunn collection, 1874-1961.
- Gustave Percival Wiksell papers, 1855-1939.
- Gutzon Borglum papers, 1895-1960.
H
- Hack, Charles W. Charles W. Hack papers, circa 1800-1926.
- Hadley, Lucia Hanna. Lucia Hanna Hadley papers. 1939-1949.
- Hagedorn, Hermann, 1882-1964. Hermann Hagedorn papers, 1912-1933.
- Hale, Edward Everett, 1822-1909. Edward Everett Hale papers.
- Hale family. Hale family papers, 1698-1916.
- Hale family papers, 1698-1916.
- Hale, Nathan, 1784-1863. Nathan Hale papers.
- Halford, Elijah Walker, 1843-1938. Elijah Walker Halford papers, 1848-1938.
- Hall, Asaph, 1829-1907. Asaph Hall papers, 1837-1983.
- Hall, Asaph, 1859-1930. Asaph Hall papers.
- Halsted B. VanderPoel literary collection, 1815-1929.
- Hambitzer, Charles, d. 1918. Charles Hambitzer music manuscripts, circa 1910-1918.
- Hamlin, Anna, d. 1925. Anna Hamlin papers.
- Hamlin, Charles S. (Charles Sumner), 1861-1938. Charles S. Hamlin papers, 1869-1968.
- Hamlin, Huybertie Pruyn, 1873-1964. Huybertie Pruyn Hamlin papers.
- Hammer, Armand, 1898-1990. Armand Hammer papers, circa 1508-1989.
- Hammond, John Hays, 1888-1965. John Hays Hammond papers, 1908-1965.
- Hampton family. Wade Hampton family papers, 1855-1935.
- Hampton, Vernon Boyce, 1897- Vernon Boyce Hampton papers, 1872-1971.
- Hampton, Wade, 1818-1902. Wade Hampton family papers, 1855-1935.
- Hand, Catharine Worthington Fowler, 1801-1865. Catharine Worthington Fowler Hand papers.
- Hand family. John Aldrich Stephenson collection of the Hand, Fiske, and Aldrich families papers. 1745-1966.
- Hand, Joseph Winborn, 1792-1844. Joseph Winborn Hand papers.
- Hand, Learned, 1872-1961. Learned Hand trial summaries, 1909-1924.
- Hanna family. Hanna-McCormick family papers, 1792-1985.
- Hanna, Marcus Alonzo, 1837-1904. Marcus Alonzo Hanna papers.
- Hanna-McCormick family papers, 1792-1985.
- Hannah G. Solomon papers, 1817-1986.
- Hans Hermann Carl Ludwig, Graf von Berlepsch, correspondence, 1874-1913.
- Hanson Weightman Baldwin papers, 1920-1978.
- Hapgood, Elizabeth Reynolds. Norman Hapgood and Elizabeth Reynolds Hapgood papers. 1824-1977.
- Hapgood, Norman, 1868-1937. Norman Hapgood and Elizabeth Reynolds Hapgood papers, 1824-1977.
- Harding, T. Swann (Thomas Swann), 1890- T. Swann Harding papers, 1918-1963.
- Hardy, D. Heywood (Dermot Heywood), 1893-1982. D. Heywood Hardy papers, 1913-1924.
- Harlan, James, 1800-1863. James Harlan papers. 1810-1863.
- Harlan, John Marshall, 1833-1911. John Marshall Harlan papers, 1810-1971.
- Harold Bauer collection, 1880-1951.
- Harold Raymond Wayne Benjamin papers, 1908-1972.
- Harriet Hoctor collection, 1917-1972.
- Harriman, Florence Jaffray, 1870-1967. Florence Jaffray Hurst Harriman papers, 1857-1982.
- Harriman, W. Averell (William Averell), 1891-1986. W. Averell Harriman papers, 1869-1988.
- Harrington Putnam papers, 1909-1928.
- Harriot Stanton Blatch papers, 1907-1915.
- Harrison, Benjamin, 1833-1901. Benjamin Harrison papers, 1780-1948.
- Harrison, Burton, Mrs., 1843-1920. Mrs. Burton Harrison papers.
- Harrison, Burton Norvell, 1838-1904. Burton Norvell Harrison family papers, 1812-1926.
- Harrison, Fairfax, 1869-1938. Fairfax Harrison papers.
- Harrison family. Burton Norvell Harrison family papers, 1812-1926.
- Harrison, Francis Burton, 1873-1957. Francis Burton Harrison papers.
- Harrison, J. B. (Jesse Burton), 1805-1841. J.B. Harrison papers.
- Harrison, Samuel Jordan, 1771-1846. Samuel Jordan Harrison papers.
- Harry Augustus Garfield papers, 1855-1961.
- Harry N. Sargent papers, 1917-1920.
- Harry Payne Whitney collection of letters of William Collins Whitney, 1757-1942.
- Harry S. Cummings papers, 1890-1986.
- Hart, Ira. Ira Hart sermon notes.
- Hart, Stanley. George Antheil correspondence to Stanley Hart. 1919-1931.
- Hartt, Charles Frederick, 1840-1878. Charles Frederick Hartt papers.
- Harvey Washington Wiley papers, 1854-1954.
- Harvey, Winfield S. Winfield S. Harvey papers.
- Hasse, Adelaide Rosalia, 1868-1953. Adelaide Rosalia Hasse papers, 1862-1951.
- Hasson, Esther Voorhees, 1867-1942. Esther Voorhees Hasson journal. 1899.
- Haupt, Herman, 1817-1905. Herman Haupt letterbook. 1861-1863.
- Haupt, Lewis M. (Lewis Muhlenberg), b. 1844. Lewis M. Haupt papers, 1849-1923.
- Hawley, Harriet Ward Foote, 1831-1886. Harriet Ward Foote Hawley papers.
- Hawley, Joseph R. (Joseph Roswell), 1826-1905. Joseph R. Hawley papers, 1638-1906.
- Hay, John, 1838-1905. John Hay papers.
- Hay, John, 1838-1905. John Hay papers, 1783-1999.
- Hayden, Alfred, b. 1894. Alfred Hayden papers.
- Hayden, Edward Everett, 1858-1932. Edward Everett Hayden family papers, 1817-1963.
- Hayden family. Edward Everett Hayden family papers, 1817-1963.
- Hayden, Herbert B. (Herbert Bainbridge), 1885-1969. Herbert B. Hayden papers.
- Hayden, Mary Bainbridge, b. 1895. Mary Bainbridge Hayden papers.
- Hayden, Reynolds, b. 1883. Reynolds Hayden papers.
- Hayden, William, 1795-1880. William Hayden papers.
- Hayes, Hammond Vinton, 1860-1947. Hammond Vinton Hayes papers.
- Heath, Perry S. (Perry Sanford), 1857-1927. Perry S. Heath papers, 1890-1983.
- Heifetz collection, 1802-1987.
- Heifetz, Jascha, 1901-1987. Jascha Heifetz collection, 1802-1987.
- Helen Keller papers, 1842-1954.
- Helm, Edith Benham, 1874-1962. Edith Benham Helm papers, 1915-1961.
- Henderson, James Houston, 1878-1935. James Houston Henderson papers, 1913-1920.
- Hendrik Christian Andersen papers, 1844-1940.
- Henri Giffard papers, 1852-1910.
- Henry Clark Corbin papers, 1864-1980.
- Henry Croskey Mustin papers, 1886-1924.
- Henry Justin Allen papers, 1896-1942.
- Henry M. Robert papers, 1853-1937.
- Henry Morgenthau papers, 1795-1941.
- Henry Northrup Castle family papers, 1394-1920.
- Henry S. Pritchett papers, 1876-1967.
- Henry T. Allen papers, 1806-1933.
- Henry T. Mayo papers, 1866-1972.
- Henry Thomas Rainey papers, 1904-1934.
- Henry Ware Lawton papers, 1849-1930.
- Henry Watterson papers, 1863-1920.
- Henry White papers, 1812-1931.
- Herbert Benjamin papers, 1915-2004.
- Herbert Corey papers, 1847-1954.
- Herbert, Victor, 1859-1924. Victor Herbert collection, 1880-1939.
- Herman Hollerith papers, 1850-1982.
- Hermann Hagedorn papers, 1912-1933.
- Herndon-Weik collection of Lincolniana, circa 1824-1933.
- Herndon, William Henry, 1818-1891. William Henry Herndon papers. 1849-1891.
- Hilary Pollard Jones papers, 1889-1937.
- Hileman, Grace. Grace Hileman correspondence. 1923-1936.
- Hillard, Harriet Low, 1809-1877. Harriet Low Hillard papers.
- Hitchcock, Gilbert M. (Gilbert Monell), 1859-1934. Gilbert M. Hitchcock papers, 1910-1935.
- Hobson, Richmond Pearson, 1870-1937. Richmond Pearson Hobson papers, 1889-1966.
- Hoctor, Harriet. Harriet Hoctor collection, 1917-1972.
- Hodges collection, circa 1790-circa 1909.
- Hodges family collection, circa 1790-circa 1909.
- Hodges family. Hodges family collection, circa 1790-circa 1909.
- Hoes, Roswell Randall, 1850-1921. Roswell Randall Hoes papers, 1799-1912.
- Holden Chester Richardson papers, 1844-1946.
- Hollerith, Herman, 1860-1929. Herman Hollerith papers, 1850-1982.
- Holmes, Oliver Wendell, 1809-1894. Oliver Wendell Holmes papers, 1837-1931.
- Hooper, Stanford Caldwell, 1884-1955. Stanford Caldwell Hooper papers, 1899-1955.
- Hoover, Irwin Hood, 1871-1933. Irwin Hood Hoover papers, 1909-1933.
- Hopkins, Charlotte Everett. Charlotte Everett Hopkins collection of National Civic Federation. Woman's Department. District of Columbia Section records, 1900-1926.
- Hopkins, Cornelia Lee, 1780-1815. Cornelia Lee Hopkins papers.
- Horace H. Lurton papers, 1860-1915.
- Horace Porter papers, 1853-1922.
- Horace Traubel and Anne Montgomerie Traubel papers, 1824-1979.
- Horne, Frederick Joseph, 1880-1959. Frederick Joseph Horne papers, 1893-1967.
- Horner, Frederick Cecil, 1887-1974. Frederick Cecil Horner papers, 1917-1960.
- Horner, Mabel Carlton. Mabel Carlton Horner biography of Caleb Henry Carlton.
- Hostos, Eugenio Carlos de, 1879-1959. Eugenio María de Hostos and Eugenio Carlos de Hostos. 1865-1990.
- Hostos, Eugenio María de, 1839-1903. Eugenio María de Hostos and Eugenio Carlos de Hostos papers. 1865-1990.
- Housman, A. E. (Alfred Edward), 1859-1936. A.E. Housman papers, 1906-1940.
- Houston, Charles Hamilton, 1895-1950. Charles Hamilton Houston papers. 1871-1935.
- Houston family. William LePre Houston family papers, 1777-1936.
- Houston, William LePre. William LePre Houston family papers, 1777-1936.
- Howard family. Howard-von Recum family papers, 1869-1972.
- Howard, Henry, Sir, 1843-1921. Howard-von Recum family papers, 1869-1972.
- Howard, Jack R. (Jack Rohe), 1910- Jack R. Howard papers.
- Howard, Roy Wilson, 1883-1964. Roy Wilson Howard papers, 1911-1966.
- Howard-von Recum family papers, 1869-1972.
- Howe, Julia Ward, 1819-1910. Julia Ward Howe papers, 1845-1917.
- Hoxie, R. L. (Richard Leveridge), 1844-1930. Vinnie Ream and Richard Leveridge Hoxie papers. 1853-1937.
- Hubbard, Gardiner G. (Gardiner Greene), 1822-1897. Gardiner G. Hubbard papers.
- Hugh Lenox Scott papers, 1582-1981.
- Hughes, Charles Evans, 1862-1948. Charles Evans Hughes papers, 1836-1950.
- Hughes, David Charles, 1832-1909. David Charles Hughes papers.
- Hughes, Everett Strait, 1885-1957. Everett Strait Hughes papers, 1903-1975.
- Hughes, Robert Patterson, 1839-1909. Robert Patterson Hughes papers, 1876-1994.
- Hugo Leichtentritt papers, 1888-1972.
- Hulsizer family. Hulsizer family papers, 1915-1941.
- Hulsizer family papers, 1915-1941.
- Humphrey, William E. (William Ewart), 1862-1934. William E. Humphrey papers, 1903-1936.
- Hunsberger, George S., 1914- George S. Hunsberger papers.
- Hyde, Dorsey William, 1888-1955. Dorsey William Hyde papers, 1757-1955.
I
- Ince, Thomas H. Thomas H. Ince papers, 1913-1964.
- Ingersoll, Royal E. (Royal Eason), 1883-1976. Royal Rodney Ingersoll and Royal E. Ingersoll papers. 1884-1931.
- Ingersoll, Royal Rodney, 1847-1931. Royal Rodney Ingersoll and Royal E. Ingersoll papers, 1866-1935.
- Institute for Intercultural Studies. Institute for Intercultural Studies records.
- Institute of Aerospace Sciences archives, 1783-1962.
- Institute of the Aerospace Sciences. Institute of the Aerospace Sciences archives.
- Irene Aloha Wright papers, 1620-1977.
- Irita Taylor Van Doren papers, 1920-1967.
- Irvine Luther Lenroot papers, 1858-1971.
- Irving Berlin collection, 1895-1990.
- Irving Langmuir papers, 1871-1957.
- Irwin Hood Hoover papers, 1909-1933.
- Isabelle Sayers collection, papers from the collection, circa 1886-1980.
- Isakower, Otto, 1899-1972. Otto Isakower and Salomea Isakower papers, 1880-1975.
- Isakower, Salomea, b. 1888. Otto Isakower and Salomea Isakower papers. 1880-1975.
- Israel Perlstein collection relating to Imperial Russia, 1613-1914.
- Isthmian Canal Commission (U.S.) Isthmian Canal Commission (U.S.) records.
- Ives, Frederic Eugene, 1856-1937. Frederic Eugene Ives and Herbert Eugene Ives papers, 1869-1957.
- Ives, Herbert Eugene, 1882-1953. Frederic Eugene Ives and Herbert Eugene Ives papers. 1869-1957.
- Izard, Elizabeth Byrd Carter Shippen. Elizabeth Byrd Carter Shippen Izard papers.
J
- J. Laurence Laughlin papers, 1902-1931.
- J. Thomas Schneider papers, 1915-1960.
- Jack, Cerise C. Cerise C. Jack papers relating to the Sacco and Vanzetti case, circa 1921-1999.
- Jacob A. Riis papers, 1870-1990.
- Jacobo Ficher collection, 1864-1997.
- Jacobs-Bond, Carrie, 1862-1946. Carrie Jacobs-Bond collection, circa 1896-circa 1944.
- Jacobs-Bond collection, circa 1896-circa 1944.
- Jacobson, Edith. Edith Jacobson papers, 1922-1977.
- Jacques Loeb papers, 1889-1924.
- James A. Farley papers, 1790-1976.
- James Couzens papers, 1903-1940.
- James Dodson Barbee and David Rankin Barbee papers, 1784-1953.
- James Harrison Wilson papers, circa 1862-1923.
- James, Henry, 1879-1947. Henry James research files.
- James Houston Henderson papers, 1913-1920.
- James J. Davis papers, 1895-1946.
- James McKeen Cattell papers, 1835-1948.
- James R. Mann papers, 1887-1922.
- James Rudolph Garfield papers, 1879-1950.
- James Wadsworth family papers, 1730-1959.
- James Whitcomb Riley papers, 1883-1915.
- Jardine, William Marion, 1879-1955. William Marion Jardine papers, 1908-1955.
- Jascha Heifetz collection, 1802-1987.
- J.C. Bancroft Davis papers, 1849-1902.
- Jeannette Thurber Connor collection of Floridiana, 1570-1927.
- Jefferson Davis papers, 1795-1913.
- Jefferson Patterson papers, 1824-1978.
- Jelliffe, Helena Dewey Leeming, d. 1916. Correspondence and diary.
- Jelliffe, Smith Ely, 1866-1945. Smith Ely Jelliffe papers, 1882-1977.
- Jennie Lorenz collection relating to Charlotte Cushman, 1830-1960.
- Jerauld Wright papers, 1853-1960.
- Jerome Kern collection, 1905-1945.
- Jesup, Thomas Sidney, 1788-1860. Thomas Sidney Jesup papers, 1780-1907.
- J.G. Randall and Ruth Painter Randall papers, 1779-1970.
- Jim Walsh collection, papers from the collection, 1867-1987, and undated.
- Jiménez, Juan Ramón, 1881-1958. Juan Ramón Jiménez papers, 1901-1954.
- John Adams Kingsbury papers, 1841-1966.
- John Alden Carpenter collection, 1891-1961.
- John Aldrich Stephenson collection of the Hand, Fiske, and Aldrich families papers, 1745-1966.
- John Alexander Logan family papers, 1836-1925.
- John Archer Lejeune papers, 1815-1950.
- John Austin Moon papers, 1832-1921.
- John Barrett papers, 1861-1943.
- John Callan O'Laughlin papers, 1895-1949.
- John D. Whiting papers, 1890-1970.
- John Davis Batchelder collection of manuscripts, 1537-1944.
- John Forsyth Meigs papers, 1914-1940.
- John G. Nicolay papers, 1811-1943.
- John H. Towers papers, 1830-1989.
- John Hay papers, 1783-1999.
- John Hays Hammond papers, 1908-1965.
- John James Beckley family papers, 1789-1918.
- John Kieran papers, 1917-1985.
- John L. McCrea papers, 1898-1984.
- John Lansing Callan papers, 1907-1956.
- John Marshall Harlan papers, 1810-1971.
- John McAuley Palmer papers, 1863-1977.
- John Merven Carrère papers, 1894-1911.
- John Sharp Williams papers, 1902-1924.
- John Spalding Flannery papers, 1902-1953.
- John Spencer Bassett papers, 1770-1978.
- John Tyler Morgan papers, 1840-1907.
- John Tyler papers, 1691-1918.
- John Vance Cheney papers, 1847-1927.
- John W. Colbert papers, 1895-1966.
- John Wills Greenslade papers, 1847-1961.
- Johnson, Adelaide, 1859-1955. Adelaide Johnson papers, 1873-1947.
- Johnson, Eric. Eric Johnson collection of Ernest Bloch photographs.
- Johnson, Eric. Eric Johnson collection of Ernest Bloch photographs, 1896-2008.
- Johnson, Nelson T. (Nelson Trusler), 1887-1954. Nelson T. Johnson papers, 1916-1955.
- Johnston, Frances Benjamin, 1864-1952. Frances Benjamin Johnston papers, 1855-1956.
- Johnston, John, 1852-1927. John Johnston papers.
- Johnston, Mercer Green, 1868-1954. Mercer Green Johnston papers, 1860-1954.
- Johnston, William Dawson, 1871-1928. William Dawson Johnston papers, 1842-1927.
- Jones, Hilary Pollard, 1863-1938. Hilary Pollard Jones papers, 1889-1937.
- Josef Breuer papers, 1859-1970.
- Joseph Arthur Moore papers, 1910-1927.
- Joseph Benson Foraker papers, 1884-1916.
- Joseph Edward Davies papers, 1860-1958.
- Joseph Hodges Choate papers, 1745-1929.
- Joseph J. Roberts family papers, 1839-2001.
- Joseph P. Tumulty papers, 1898-1969.
- Joseph Pulitzer papers, 1880-1924.
- Joseph R. Hawley papers, 1638-1906.
- Joseph Sanford Wade papers, 1898-1955.
- Joseph Smith Fowler papers, 1863-1903.
- Joseph Strauss papers, 1884-1949.
- Joseph Warren Beach papers, 1891-1955.
- Josephus Daniels papers, 1829-1948.
- Joshua Lawrence Chamberlain papers, 1775-1913.
- Juan Ramón Jiménez papers, 1901-1954.
- Jubal Anderson Early papers, 1829-1930.
- Judson King papers, 1900-1958.
- Julia Ward Howe papers, 1845-1917.
- Julius Augustus Furer papers, 1910-1962.
- Julius Gold collection, 1858-1924.
- Justin G. Turner autograph collection, 1763-1968.
K
- Kantor, MacKinlay, 1904-1977. MacKinlay Kantor papers, 1885-1977.
- Karl Abraham papers, 1908-1925.
- Katharine Amend Kellock papers, 1924-1969.
- Kaufman, George S. (George Simon), 1889-1961. George S. Kaufman papers, 1911-1941.
- Kaye, Danny. Danny Kaye and Sylvia Fine collection, 1893-1988.
- Keene, Francis Bowler, 1856-1945. Francis Bowler Keene papers, 1856-1975.
- Keidel family. Keidel family papers, 1821-1937.
- Keidel family papers, 1821-1937.
- Keidel, George C. (George Charles), 1868-1942. George C. Keidel papers. 1821-1934.
- Keller, Helen, 1880-1968. Helen Keller papers, 1842-1954.
- Kellock, Harold, 1879-1953. Harold Kellock papers. 1929.
- Kellock, Katharine Amend, b. 1892. Katharine Amend Kellock papers, 1924-1969.
- Kellogg, Edward Nealy, 1841-1874. Edward Nealy Kellogg and Edward Stanley Kellogg papers, 1858-1937.
- Kellogg, Edward Stanley, 1870-1948. Edward Nealy Kellogg and Edward Stanley Kellogg papers. 1858-1937.
- Ken McCormick collection of Doubleday and Company, inc., records, 1882-1992.
- Kendrick-Brooks family papers, 1831-2000.
- Kendrick family. Kendrick-Brooks family papers, 1831-2000.
- Kendrick, Hattie, 1894-1989. Hattie Kendrick papers. 1942-2000.
- Kendrick, Ruby Moyse, 1886-1986. Ruby Moyse Kendrick papers. 1892-1995.
- Kennedy, J. C. G. (Joseph Camp Griffith), 1813-1887. J.C.G. Kennedy diary. 1851.
- Kent, Joey. Louisiana hayride collection, 1904-2006.
- Kermit Roosevelt and Belle Roosevelt papers, 1725-1975.
- Kern collection, 1905-1945.
- Kern, Jerome, 1885-1945. Jerome Kern collection, 1905-1945.
- Key Pittman papers, 1898-1951.
- Kieran, John, 1892-1981. John Kieran papers, 1917-1985.
- King, Judson, 1872-1958. Judson King papers, 1900-1958.
- Kingsbury, John Adams, 1876-1956. John Adams Kingsbury papers, 1841-1966.
- Kirk Munroe papers, 1850-1940.
- Klemperer, Otto, 1885-1973. Otto Klemperer archive, 1792-1988.
- Klemperer, Otto, 1885-1973. Otto Klemperer correspondence.
- Kline, Burton, 1877-1958. Burton Kline papers, 1896-1954.
- Klyce, Scudder, 1879-1933. Scudder Klyce papers, 1911-1933.
- Klyce, Scudder, 1879-1933. Universe (1921).
- Knox, Annie Reid, 1876-1958. Annie Reid Knox papers. 1936-1954.
- Knox, Dudley Wright, 1877-1960. Dudley Wright Knox papers, circa 1864-1950.
- Knox, Frank, 1874-1944. Frank Knox papers, 1898-1954.
- Kolisch, Rudolf, 1896-1978. Rudolf Kolisch collection, 1921-1943.
- Koller, Carl, 1857-1944. Carl Koller papers, 1866-1988.
- Koussevitzky archive 1920-1976.
- Koussevitzky, Serge, 1874-1951. Serge Koussevitzky archive, 1920-1976.
- Kraft, Victor, 1915-1976. Victor Kraft materials.
- Kreisler collection, 1845-1969.
- Kreisler, Fritz, 1875-1962. Fritz Kreisler collection, 1845-1969.
L
- La Follette, Belle Case, 1859-1931. Papers of Belle Case La Follette (1879-1931).
- La Follette family papers, 1781-1988.
- La Follette, Fola, 1882-1970. Papers of Fola La Follette (1879-1970).
- La Follette, Mary Josephine, 1899-1988. Papers of Mary Josephine La Follette (1925-1988).
- La Follette, Philip Fox, 1897-1965. Papers of Philip Fox La Follette (1911-1971).
- La Follette, Robert M. (Robert Marion), 1855-1925. Papers of Robert M. La Follette (1844-1925).
- La Follette, Robert M. (Robert Marion), 1895-1953. Papers of Robert M. La Follette (1895-1960).
- Lafayette, Marie Joseph Paul Yves Roch Gilbert Du Motier, marquis de, 1757-1834. Marie Joseph Paul Yves Roch Gilbert Du Motier, marquis de Lafayette, papers, 1776-1934.
- Lamont, Daniel Scott, 1851-1905. Daniel Scott Lamont papers, 1853-1928.
- Lamson-Scribner, F. F. Lamson-Scribner papers, 1885-1938.
- Lane, J. F., fl. 1834-1835. J.F. Lane letterbook. 1834-1835.
- Langmuir, Irving, 1881-1957. Irving Langmuir papers, 1871-1957.
- Lansing, Robert, 1864-1928. Robert Lansing papers, 1831-1935.
- Laughlin, J. Laurence (James Laurence), 1850-1933. J. Laurence Laughlin papers, 1902-1931.
- Laura Wood Roper papers, 1822-1982.
- Lauro Ayestarán collection, 1830-1966.
- Lawrence, D. H. (David Herbert), 1885-1930. D.H. Lawrence correspondence, notes, and photographs, 1921-1930.
- Lawrence, Dorothea Dix, 1899-1979. Dorothea Dix Lawrence collection, 1856-1980.
- Lawton, Henry Ware, 1843-1899. Henry Ware Lawton papers, 1849-1930.
- Le Gallienne, Eva, 1899-1991. Eva Le Gallienne papers, 1875-1993.
- Le Gallienne, Julie Nørregaard, 1863-1942. Julie Nørregaard Le Gallienne papers.
- Le Gallienne, Richard, 1866-1947. Richard Le Gallienne papers.
- Le Garrec, Mary Virginia Foreman. Mary Virginia Foreman Le Garrec collection of Artur Schnabel materials.
- Le Garrec, Mary Virginia Foreman. Mary Virginia Foreman Le Garrec collection of Artur Schnabel materials, 1893-1996.
- League of Composers (U.S.). Modern Music archives, 1909-1983.
- League of Women Voters (U.S.). League of Women Voters (U.S.) records, 1884-1986.
- League of Women Voters (U.S.) records, 1884-1986.
- Learned Hand trial summaries, 1909-1924.
- Leason Heberling Adams papers, 1919-1968.
- Lederman, Minna. Minna Lederman Daniel collection.
- Lee, Ann Hill Carter, 1773-1829. Ann Hill Carter Lee papers.
- Lee, Anne Robinson McCarty, 1798-1840. Anne Robinson McCarty Lee papers.
- Lee, Charles Carter, 1798-1871. Charles Carter Lee papers.
- Lee De Forest papers, 1884-1955.
- Lee, Elizabeth Collins, d. 1858. Elizabeth Collins Lee papers.
- Lee family. Ethel Armes collection of Lee family papers, 1671-1936.
- Lee, Henry, 1756-1818. Henry Lee papers.
- Lee, Henry, 1787-1837. Henry Lee papers.
- Lee, Mary Randolph Custis, 1807-1873. Mary Randolph Custis Lee papers.
- Lee, Richard Bland, 1761-1827. Richard Bland Lee papers.
- Lee, Richard Henry, 1794-1865. Richard Henry Lee papers.
- Lee, Robert E. (Robert Edward), 1807-1870. Robert E. Lee papers.
- Lee, Rowland V., 1891-1975. Rowland V. Lee papers, 1907-1971.
- Lee, Thomas, 1690-1750. Thomas Lee papers.
- Leffingwell, R. C. (Russell Cornell), 1878-1960. R.C. Leffingwell letterbooks, 1917-1920.
- Leichtentritt, Hugo, 1874-1951. Hugo Leichtentritt papers, 1888-1972.
- Leighton W. Rogers papers, 1912-1982.
- Lejeune, John Archer, 1867-1942. John Archer Lejeune papers, 1815-1950.
- Lenroot, Clara Clough, 1856-1942. Clara Clough Lenroot papers.
- Lenroot, Irvine Luther, 1869-1949. Irvine Luther Lenroot papers, 1858-1971.
- Leon F. Barnard papers, 1901-circa 1993.
- Leontiĭ, Metropolitan of All America and Canada, 1876-1965. Leontiĭ, Metropolitan of All America and Canada, papers, 1855-1962.
- Leontiĭ, Metropolitan of All America and Canada, papers, 1855-1962.
- Lester Frank Ward papers, 1883-1906.
- Lester Hood Woolsey papers, 1831-1958.
- Lewis M. Haupt papers, 1849-1923.
- Lewis Nathaniel Chase papers, 1836-1947.
- Lewis, Nolan D. C. (Nolan Don Carpentier), 1889-1979. Nolan D.C. Lewis papers, 1897-1978.
- Lewis Whitfield Colson papers, 1894-1950.
- Libby, Abial. Abial Libby diary. 1862.
- Libby, Frederick J. (Frederick Joseph), 1874-1970. Frederick Joseph Libby papers, 1846-1973.
- Library of Congress. Elizabeth Sprague Coolidge Foundation. Correspondence from the Elizabeth Sprague Coolidge Foundation collection. 1894-1953.
- Lifar, Serge, 1905-1986. Serge Diaghilev/Serge Lifar collection. 1750-1950.
- Lillian Gish papers, 1829-1978.
- Lincoln, Abraham, 1809-1865. Abraham Lincoln correspondence. 1864 July 9.
- Lincoln, Abraham, 1809-1865. Abraham Lincoln papers.
- Lincoln, Abraham, 1809-1865. Abraham Lincoln papers, 1774-1948.
- Lincoln, Abraham, 1809-1865. Abraham Lincoln papers. 1824-1865.
- Lincoln, Abraham, 1809-1865. Robert Todd Lincoln family papers. 1864-1938.
- Lincoln family. Robert Todd Lincoln family papers, 1864-1938.
- Lincoln, Mary Todd, 1818-1882. Robert Todd Lincoln family papers. 1864-1938.
- Lincoln, Robert Todd, 1843-1926. Robert Todd Lincoln family papers, 1864-1938.
- Little, Arthur D. (Arthur Dehon), 1863-1935. Arthur D. Little papers, 1884-1973.
- Livermore, Eunice. Eunice Livermore papers.
- Livermore, Isaac. Isaac Livermore papers.
- Livingston, Anne Home Shippen, 1763-1841. Anne Home Shippen Livingston papers. (2)
- Lochner, Louis Paul, 1887-1975. Louis Lochner papers.
- Loeb, Jacques, 1859-1924. Forced movements, tropisms, and animal conduct. 1918.
- Loeb, Jacques, 1859-1924. Jacques Loeb papers, 1889-1924.
- Loeb, Jacques, 1859-1924. Proteins and the theory of colloidal behavior. 1922.
- Loeb, Jacques, 1859-1924. Regeneration from a physico-chemical viewpoint. 1924.
- Loening, Grover, 1888-1976. Grover Cleveland Loening papers, 1900-1975.
- Logan family. John Alexander Logan family papers, 1836-1925.
- Logan, John A., Mrs., 1838-1923. Mrs. John A. Logan papers.
- Logan, John Alexander, 1826-1886. John Alexander Logan family papers, 1836-1925.
- Logan, John Alexander, 1865-1899. John Alexander Logan papers.
- Logan Pearsall Smith papers, 1760-1946.
- Loines, Mary Hillard, 1844-1944. Mary Hillard Loines papers.
- Long, Breckinridge, 1881-1958. Breckinridge Long papers, 1486-1948.
- Longworth, Alice Roosevelt, 1884-1980. Alice Roosevelt Longworth papers, 1888-1942.
- Longworth, Nicholas, 1869-1931. Nicholas Longworth papers, 1782-1931.
- Lopatnikoff, Nikolai, 1903-1976. Nikolai Lopatnikoff collection, 1916-1979.
- Loper family. Palmer-Loper family papers, 1667-1994.
- Loper, R. F. (Richard F.) R.F. Loper papers.
- Lorand, Sándor, 1892- Sándor Lorand papers, 1914-1978.
- Lorenz, Jennie, 1886-1962. Jennie Lorenz collection relating to Charlotte Cushman, 1830-1960.
- Lorge, Irving, 1905-1961. Semantic count of English words. 1938.
- Lorimer, George Horace, 1869-1937. George Horace Lorimer correspondence.
- Louis F. Post papers, 1864-1940.
- Louis-Pierre Mouillard papers, 1833-1987.
- Louise Chandler Moulton papers, 1852-1908.
- Louisiana hayride collection, 1904-2006.
- Low, Abiel Abbot, 1811-1893. Abiel Abbot Low papers.
- Low, Edward Allen, 1817-1898. Edward Allen Low papers.
- Low family. Low-Mills family papers, 1767-1971.
- Low-Mills family papers, 1767-1971.
- Lowenfeld, Margaret, 1890-1973. Margaret Lowenfeld papers.
- Luce, Stephen Bleecker, 1827-1917. Stephen Bleecker Luce papers, 1799-1955.
- Lucius C. Dunn papers, 1902-1957.
- Lucretia Rudolph Garfield papers, 1807-1958.
- Lurton, Horace H. (Horace Harmon), 1844-1914. Horace H. Lurton papers, 1860-1915.
- Luther Burbank papers, 1830-1989.
- Lydia Nadejena papers, 1907-1974.
- Lyman Bryson papers, 1893-1978.
- Lyman J. Gage correspondence, 1897-1906.
- Lynch, Grace C., ca. 1892-1970. Papers of Grace C. Lynch (1905-1965).
- Lynd, Helen Merrell, 1896-1982. Robert Staughton and Helen Merrell Lynd papers. 1895-1968.
- Lynd, Robert Staughton, 1892-1970. Robert Staughton Lynd and Helen Merrell Lynd papers, 1895-1968.
M
- Maass, Charles. Charles Maass papers, 1912-1924.
- Mabel Thorp Boardman papers, 1853-1945.
- Mabel Walker Willebrandt papers, 1881-1978.
- MacDowell, Edward, 1860-1908. Edward MacDowell papers.
- MacDowell, Marian, 1857-1956. Marian MacDowell papers, 1876-1969.
- MacKinlay Kantor papers, 1885-1977.
- Maclay, Edgar Stanton, 1863-1919. Edgar Stanton Maclay papers, 1782-circa 1918.
- Macomb, Alexander, 1888-1970. Alexander Macomb papers.
- Macomb, Ann Minerva Rodgers, 1824-1916. Ann Minerva Rodgers Macomb papers.
- Macomb, Christina, 1861-1945. Christina Macomb papers.
- Macomb, Nannie, 1864-1952. Nannie Macomb papers.
- Mahan, A. T. (Alfred Thayer), 1840-1914. A.T. Mahan papers, 1779-1970.
- Malaney, Curtis L., 1926-1989. Curtis L. Malaney papers, 1923-1989.
- Mamoulian, Rouben. Rouben Mamoulian papers, 1740-1987.
- Mann, James R. (James Robert), 1856-1922. James R. Mann papers, 1887-1922.
- Mann, Thomas, 1875-1955. Thomas Mann papers, 1909-1947.
- Mannes, Clara, 1869-1948. Mannes - Damrosch collection. 1948-1986.
- Mannes - Damrosch collection, 1848-1986.
- Mannes, David, 1866-1959. Mannes - Damrosch collection.
- Mannes, David, 1866-1959. Mannes - Damrosch collection, 1848-1986.
- Mansfield, Richard, 1857-1907. Paul Wilstach collection of Richard Mansfield papers. 1889-1918.
- Marburg, Theodore, 1862-1946. Theodore Marburg papers, 1859-1940.
- Margaret Mead papers and South Pacific Ethnographic Archives, 1838-1996.
- Maria Montessori lectures, 1913-1917.
- Marian MacDowell papers, 1876-1969.
- Marie Joseph Paul Yves Roch Gilbert Du Motier, marquis de Lafayette, papers, 1776-1934.
- Mario Castelnuovo-Tedesco papers, 1822-1998.
- Mark Sullivan papers, 1900-1935.
- Markham, Edwin, 1852-1940. Edwin Markham papers, circa 1893-1937.
- Markoe, Sophie D. Sophie D. Markoe papers. 1852-1911.
- Marsh, Benjamin Clarke, 1877-1952. Benjamin Clarke Marsh papers, 1910-1950.
- Marshall P. Wilder papers, 1880-1914.
- Marston, Philip Bourke, 1850-1887. Philip Bourke Marston papers.
- Marston, Westland, 1819-1890. Westland Marston papers.
- Martin Oviatt papers, 1863-1995.
- Mary Amanda Dixon Jones papers, 1839-1925.
- Mary Ann Bickerdyke papers, 1847-1905.
- Mary Church Terrell papers, 1851-1962.
- Mary French Sheldon papers, 1885-1938.
- Mary Virginia Foreman Le Garrec collection of Artur Schnabel materials, 1893-1996.
- Mason, Charles, 1804-1882. Charles Mason papers.
- Mason family. Charles Mason Remey family papers, 1778-1949.
- Massachusetts Colonization Society. Massachusetts Colonization Society letterbooks. 1856-1875.
- Matteson, David Maydole, 1871-1949. David Maydole Matteson papers, 1876-1937.
- Matthew Stanley Quay papers, 1776-1949.
- Maud Wood Park papers, 1844-1979.
- Maugham, W. Somerset (William Somerset), 1874-1965. W. Somerset Maugham papers, 1897-1966.
- Max Schur papers, 1923-1974.
- Maxwell Anderson papers, 1920-1989.
- Mayo, Henry T. (Henry Thomas), 1856-1937. Henry T. Mayo papers, 1866-1972.
- McAdoo, Eleanor Wilson, 1889-1967. Eleanor Wilson McAdoo papers. 1911-1950.
- McAdoo family. Wilson-McAdoo families papers, 1860-1966.
- McAtee, W. L. (Waldo Lee), 1883-1962. W.L. McAtee papers, 1803-1963.
- McClure, Charles, 1838-1902. Charles McClure papers. 1849-1926.
- McClure family. Gibson-Getty-McClure families papers, 1777-1926.
- McConnell, Edward F. Edward F. McConnell papers.
- McConnell family. Pike-McConnell-Donaldson family papers, 1770-1967.
- McConnell, James S. James S. McConnell papers.
- McCormick family. Hanna-McCormick family papers, 1792-1985.
- McCormick, Ken, 1906-1997. Ken McCormick collection of Doubleday and Company, inc., records. 1882-1992.
- McCormick, Medill, 1877-1925. Medill McCormick papers.
- McCrea, John L. (John Livingstone), 1891- John L. McCrea papers, 1898-1984.
- McGee, Anita Newcomb, 1864-1940. Anita Newcomb McGee papers, 1688-1932.
- McGee, W J, 1853-1912. W J McGee papers, 1880-1916.
- McGowan, Samuel, 1870-1934. Samuel McGowan papers, 1883-1943.
- McKelway, Alexander Jeffrey, 1866-1918. Alexander Jeffrey McKelway papers, 1814-1942.
- McKenney, Flannery & Craighill. McKenney, Flannery & Craighill records.
- McKim, Charles Follen, 1847-1909. Charles Follen McKim papers, 1838-1929.
- McKinlay, Whitefield, 1857-1941. Whitefield McKinlay papers. 1848-1913.
- McKinley, William, 1843-1901. William McKinley papers, circa 1847-1935.
- McKinley, William Brown, 1856-1926. William Brown McKinley papers.
- McLain, William. William McLain papers. 1831-1850.
- McLeod, Norman Z., 1898-1964. Norman Z. McLeod papers.
- Mead, Margaret, 1901-1978. Margaret Mead papers and South Pacific Ethnographic Archives, 1838-1996.
- Mearns, Edgar Alexander, 1856-1916. Edgar Alexander Mearns papers, 1864-1918.
- Medtner, Nikolay Karlovich, 1880-1951. Nikolay Karlovich Medtner papers, 1826-1954.
- Meier, Nellie Simmons, d. 1939. Nellie Simmons Meier papers, 1898-1938.
- Meigs, John Forsyth, 1848-1924. John Forsyth Meigs papers, 1914-1940.
- Meigs, Return Jonathan, 1740-1823. Return Jonathan Meigs papers.
- Meigs, Return Jonathan, 1764-1825. Return Jonathan Meigs papers.
- Melville Weston Fuller papers, 1794-1949.
- Mercer Green Johnston papers, 1860-1954.
- Mercy-Argenteau family papers, 1410-1921.
- Mercy family. Mercy-Argenteau family papers, 1410-1921.
- Merrill, George P. (George Perkins), 1854-1929. George P. Merrill correspondence and autographs, 1803-1926.
- Middleton, George, 1880-1967. George Middleton papers, 1872-1970.
- Miles-Cameron families correspondence, 1661-1956.
- Miles family. Miles-Cameron families correspondence, 1661-1956.
- Miles, Nelson Appleton, 1839-1925. Miles-Cameron families correspondence, 1661-1956.
- Milholland, Inez. Inez Millholland papers. 1900-1937.
- Millay, Cora Buzzell. Cora Buzzell Millay papers. 1832-1932.
- Millay, Edna St. Vincent, 1892-1950. Edna St. Vincent Millay papers, 1832-1992.
- Millay, Norma. Norma Millay papers. 1894-1983.
- Miller, Adolph Caspar, 1866-1953. Adolph Caspar Miller papers, 1913-1947.
- Miller, Cyrus Robinson, 1874-1947. Cyrus Robinson Miller papers, 1897-1940.
- Mills family. Low-Mills family papers, 1767-1971.
- Minnie Maddern Fiske and Harrison Grey Fiske papers, 1818-1955.
- Mira Lloyd Dock papers, 1814-1951.
- Miscellaneous papers in the Sigmund Freud collection, 1866-1983.
- Mitchell, Antoinette Brooks, 1892-1972. Antoinette Brooks Mitchell papers. 1894-1974.
- Mitchell, Louis A., 1885-1957. Louis A. Mitchell papers. 1894-1974.
- Mitchell, Louis A., 1914-1972. Louis A. Mitchell papers. 1912-1972.
- Mitchell, Samuel Chiles, 1864-1948. Samuel Chiles Mitchell papers, 1903-1913.
- Mitchell, Samuel Chiles, 1864-1948. Unpublished biography of Robert C. Ogden.
- Modern Music archives, 1909-1983.
- Moldenhauer archives at the Library of Congress, circa 1000-circa 1990.
- Moldenhauer, Hans. Moldenhauer archives at the Library of Congress, circa 1000-circa 1990.
- Montessori, Maria, 1870-1952. Maria Montessori lectures, 1913-1917.
- Montgomery Meigs Taylor papers, 1890-1935.
- Moody, William H. (William Henry), 1853-1917. William H. Moody papers. 1906-1910.
- Moon, John Austin, 1855-1921. John Austin Moon papers, 1832-1921.
- Moore, Charles, 1855-1942. Charles Moore papers, 1848-1944.
- Moore, Joseph Arthur, 1879-1937. Joseph Arthur Moore papers, 1910-1927.
- Moorfield Storey papers, 1876-1929.
- Moral Re-armament (Organization). Moral Re-armament records, 1812-1991.
- Moral Re-armament records, 1812-1991.
- Morgan, John Tyler, 1824-1907. John Tyler Morgan papers, 1840-1907.
- Morgenthau, Henry, 1856-1946. Henry Morgenthau papers, 1795-1941.
- Morris, Arthur J., 1881-1973. Arthur J. Morris papers, 1888-1976.
- Morrisson, Mary Foulke. Mary Foulke Morrisson scrapbooks.
- Morton L. Deyo papers, 1911-1981.
- Moseley, George Van Horn, 1874-1960. George Van Horn Moseley papers, 1855-1960.
- Mouillard, Louis-Pierre, 1834-1897. Louis-Pierre Mouillard papers, 1833-1987.
- Moulton, Louise Chandler, 1835-1908. Louise Chandler Moulton papers, 1852-1908.
- Mount Rushmore National Memorial Commission. Mount Rushmore National Memorial Commission records. 1920-1941.
- Munroe, Kirk, 1850-1930. Kirk Munroe papers, 1850-1940.
- Munroe, Mabel Stearns. Mabel Stearns Munroe papers.
- Munroe, Mary Barr. Mary Barr Munroe papers.
- Murdock, Marcellus M. (Marcellus Marion), 1883-1970. Marcellus M. Murdock papers. 1903-1943.
- Murdock, Marshall M. (Marshall Mortimer), 1837-1908. Marshall M. Murdock papers. 1863-1904.
- Murdock, Victor. Victor Murdock papers, 1824-1971.
- Murray, George D., 1886-1956. George D. Murray papers, 1916-1956.
- Mustin, Henry Croskey, 1874-1923. Henry Croskey Mustin papers, 1886-1924.
N
- Nadejena, Lydia, 1892?-1977. Lydia Nadejena papers, 1907-1974.
- Nathan Appleton papers, 1850-1904.
- Nathan Sargent papers, 1866-1957.
- Nathaniel Sisson papers, 1838-1932.
- Nathaniel Wright family papers, 1787-1917.
- National American Woman Suffrage Association. League of Women Voters. National American Woman Suffrage Association. League of Women Voters records.
- National American Woman Suffrage Association. National American Woman Suffrage Association records, 1839-1961.
- National American Woman Suffrage Association records, 1839-1961.
- National Association for the Advancement of Colored People. National Association for the Advancement of Colored People records, 1842-1999.
- National Association for the Advancement of Colored People records, 1842-1999.
- National Association for the Advancement of Colored People. Washington Bureau. National Association for the Advancement of Colored People. Washington Bureau records. 1914-1993.
- National Association for Universal Military Training. National Association for Universal Military Training records, 1909-1933.
- National Association for Universal Military Training records, 1909-1933.
- National Biographical Society (Washington, D.C.) National Biographical Society (Washington, D.C.) records.
- National Broadcasting Company history files, 1922-1986.
- National Broadcasting Company. National Broadcasting Company history files, 1922-1986.
- National Child Labor Committee (U.S.). National Child Labor Committee (U.S.) records, 1904-1953.
- National Child Labor Committee (U.S.) records, 1904-1953.
- National Civic Federation. Woman's Department. District of Columbia Section. Charlotte Everett Hopkins collection of National Civic Federation. Woman's Department. District of Columbia Section records. 1900-1926.
- National Committee on Federal Aid to Education. National Committee on Federal Aid to Education records.
- National Consumers' League. National Consumers' League records, 1882-1986.
- National Consumers' League records, 1882-1986.
- National League of Women Voters (U.S.) National League of Women Voters (U.S.) records.
- National Progressive Republican League. Records of the National Progressive Republican League (1911-1912).
- National Woman's Party. National Woman's Party records.
- National Woman's Party. National Woman's Party records, 1850-1975.
- National Woman's Party records, 1850-1975.
- National Woman's Party. Visual materials from the records of the National Woman's Party.
- National Women's Trade Union League of America. National Women's Trade Union League of America records, 1903-1950.
- National Women's Trade Union League of America records, 1903-1950.
- Nazimova, 1879-1945. Nazimova collection, 1877-1988.
- Nazimova collection, 1877-1988.
- Nellie Simmons Meier papers, 1898-1938.
- Nelson T. Johnson papers, 1916-1955.
- Nelson W. Aldrich papers, 1777-1930.
- Nepomuceno, Alberto, 1864-1920. Alberto Nepomuceno collection, 1887-1920.
- Nevin, Wilberforce, d. 1899. Wilberforce Nevin letterbook. 1861-1864.
- New York Society for the Suppression of Vice. New York Society for the Suppression of Vice records, 1871-1953.
- New York Society for the Suppression of Vice records, 1871-1953.
- Newton Diehl Baker papers, 1896-1962.
- Nicaraguan Canal Commission (U.S.) Nicaraguan Canal Commission (U.S.) records.
- Nicholas Longworth papers, 1782-1931.
- Nicholson, Augustus S., 1830-1911. Augustus S. Nicholson papers, 1861-1934.
- Nicolas Slonimsky collection, 1873-1997.
- Nicolay, Helen, 1866-1954. Helen Nicolay papers.
- Nicolay, John G. (John George), 1832-1901. John G. Nicolay papers, 1811-1943.
- Niehaus, Earl F. Earl F. Niehaus thesis. 1955.
- Nielsen, Fred Kenelm, 1879-1963. Fred Kenelm Nielsen papers, 1881-1961.
- Nikolai Lopatnikoff collection, 1916-1979.
- Nikolay Karlovich Medtner papers, 1826-1954.
- Noel Deisch papers, 1910-1937.
- Nolan D.C. Lewis papers, 1897-1978.
- Norman Hapgood and Elizabeth Reynolds Hapgood papers, 1824-1977.
- Norton, Reuben S. Reuben S. Norton papers.
O
- O'Connor, William Douglas, 1832-1889. William Douglas O'Connor papers.
- O'Laughlin, John Callan, 1873-1949. John Callan O'Laughlin papers, 1895-1949.
- O'Neil, Charles, 1842-1927. Charles O'Neil papers, 1833-1927.
- O'Reilly, Alejandro, 1725-1794. Alejandro O'Reilly manuscript volume.
- Octave Chanute papers, 1807-1955.
- Ogden, Robert C. (Robert Curtis), 1836-1913. Robert C. Ogden papers, 1843-1913.
- Ogle, Dora G. Dora G. Ogle papers. 1892-1944.
- Oldberg, Arne, 1874-1962. Arne Oldberg collection, circa 1887-1962.
- Oliver Ellsworth family papers, 1762-1907.
- Oliver Freud and Henny Fuchs Freud papers, 1821-1993.
- Oliver Wendell Holmes papers, 1837-1931.
- Olmsted Associates. Olmsted Associates records.
- Olmsted Associates. Olmsted Associates records, 1863-1971.
- Olmsted Associates records, 1863-1971.
- Olmsted Brothers. Olmsted Brothers records. (2)
- Olmsted, Frederick Law, 1822-1903. Frederick Law Olmsted papers. (2)
- Olmsted, Frederick Law, 1822-1903. Frederick Law Olmsted papers, 1777-1952.
- Olmsted, Frederick Law, 1870-1957. Frederick Law Olmsted papers.
- Olmsted, Gideon, 1749-1845. Gideon Olmsted papers.
- Olmsted, John, 1791-1873. John Olmsted papers.
- Olmsted, John Charles, 1852-1920. John Charles Olmsted papers.
- Olmsted, Olmsted, and Eliot. Olmsted, Olmsted, and Eliot records. (2)
- Olney, Richard, 1835-1917. Richard Olney papers, 1830-1928.
- Orr, Charlotte Pettis. Charlotte Pettis Orr papers.
- Orr, William, 1860-1939. William Orr papers, 1890-1939.
- Oscar S. Straus Memorial Association. Oscar S. Straus Memorial Association records. 1927-1954.
- Oscar S. Straus papers, 1856-1955.
- Oscar Terry Crosby papers, 1878-1947.
- Osgood family. Field-Osgood family papers, 1702-1938.
- Osgood, Maria Bowne Franklin. Maria Bowne Franklin Osgood papers.
- Osgood, Samuel, 1748-1813. Samuel Osgood papers.
- Oskar Ursinus papers, 1908-1943.
- Oswald Veblen papers, 1881-1960.
- Otto Isakower and Salomea Isakower papers, 1880-1975.
- Otto Klemperer archive, 1792-1988.
- Oviatt, Martin. Martin Oviatt papers, 1863-1995.
- Owen, Robert L. (Robert Latham), 1856-1947. Robert Latham Owen papers, 1910-1941.
- Owen Wister papers, 1829-1966.
- Oxnam, G. Bromley (Garfield Bromley), 1891-1963. G. Bromley Oxnam papers, 1823-1963.
P
- Page, Curtis Hidden, 1870-1946. Correspondence and poetry.
- Palmer, Alexander Smith, 1806-1894. Alexander Smith Palmer papers.
- Palmer family. Palmer-Loper family papers, 1667-1994.
- Palmer, John McAuley, 1870-1955. John McAuley Palmer papers, 1863-1977.
- Palmer-Loper family papers, 1667-1994.
- Palmer, Nathaniel Brown, 1799-1877. Nathaniel Brown Palmer papers.
- Palmer, T. S. (Theodore Sherman), 1868-1955. T. S. Palmer papers, 1877-1954.
- Panama Collection, 1804-1977.
- Pankejeff, Sergius, 1887-1979. Sergius Pankejeff papers, 1901-1979.
- Papers from the Isabelle Sayers collection, circa 1886-1980.
- Papers from the Jim Walsh collection, 1867-1987, and undated.
- Park, Maud Wood, 1871-1955. Maud Wood Park papers, 1844-1979.
- Parker, Alton B. (Alton Brooks), 1852-1926. Alton B. Parker papers, 1878-1937.
- Parr-Gere, Florence, b. 1875. Florence Parr-Gere papers, 1856-1964.
- Patri, Angelo, b. 1876. Angelo Patri papers, 1904-1962.
- Patterson, Jefferson, 1891-1977. Jefferson Patterson papers, 1824-1978.
- Patton, George S. (George Smith), 1885-1945. George S. Patton papers, 1807-1979.
- Paul, Alice, 1885-1977. Alice Paul papers. 1900-1968.
- Paul Federn papers, 1864-1975.
- Paul J. Pelz papers, circa 1800-1921.
- Paul Wilstach collection of Richard Mansfield papers, 1889-1918.
- Paulette Greene papers, 1920-1998.
- Peabody, George Foster, 1852-1938. George Foster Peabody papers, 1894-1937.
- Pelz, Paul J., 1841-1918. Paul J. Pelz papers, circa 1800-1921.
- People's Legislative Service. People's Legislative Service records, 1921-1931.
- People's Legislative Service records, 1921-1931.
- Percival Flack Brundage papers, 1918-1979.
- Perlstein, Israel, 1897-1975. Israel Perlstein collection relating to Imperial Russia, 1613-1914.
- Perry, Matthew Calbraith, 1794-1858. Matthew Calbraith Perry papers.
- Perry, Oliver Hazard, 1785-1819. Oliver Hazard Perry papers.
- Perry S. Heath papers, 1890-1983.
- Pershing, John J. (John Joseph), 1860-1948. John J. Pershing papers.
- Peter A. Demens papers, 1880-2000.
- Peters, Thomas Kimmwood, 1879-1973. Thomas Kimmwood Peters papers, 1896-1973.
- Phelps, John S. (John Smith), 1814-1886. John S. Phelps papers.
- Phelps, Mary Whitney. Mary Whitney Phelps papers.
- Phi Beta Kappa. Phi Beta Kappa records, 1776-2006.
- Phi Beta Kappa records, 1776-2006.
- Philippe Bunau-Varilla papers, 1877-1955.
- Pickerill, Elmo N. (Elmo Neale), 1885-1968. Elmo N. Pickerill papers, 1910-1975.
- Pickett family. Christiancy and Pickett families' papers, 1835-1998.
- Pickett, George E. (George Edward), 1825-1875. George E. Pickett papers.
- Pickett, George E. (George Edward), 1891 or 2-1959. George E. Pickett papers.
- Pickett, La Salle Corbell, 1848-1931. La Salle Corbell Pickett papers.
- Pike family. Pike-McConnell-Donaldson family papers, 1770-1967.
- Pike-McConnell-Donaldson family papers, 1770-1967.
- Pinchot, Amos, 1873-1944. Amos Pinchot papers, 1856-1945.
- Pinchot, Cornelia Bryce, 1881-1960. Cornelia Bryce Pinchot papers, 1899-1960.
- Pinchot, Gifford, 1865-1946. Gifford Pinchot papers, 1770-1972.
- Pinchot, James W., 1831-1908. James W. Pinchot papers.
- Pinchot, Mary Eno. Mary Eno Pinchot papers.
- Pinchot, Rosamond, 1904-1938. Rosamond Pinchot papers, 1918-1955.
- Pinkerton, Allan, 1819-1884. Allan Pinkerton papers.
- Pinkerton, Allan, 1876-1930. Allan Pinkerton papers.
- Pinkerton, Robert A., 1904-1967. Robert A. Pinkerton papers.
- Pinkerton, Robert A. (Robert Allan), 1848-1907. Robert A. Pinkerton papers.
- Pinkerton, William A. (William Allan), 1846-1923. William A. Pinkerton papers.
- Pinkerton's National Detective Agency. Pinkerton's National Detective Agency records, 1853-1999.
- Pinkerton's National Detective Agency records, 1853-1999.
- Pittman, Key, 1872-1940. Key Pittman papers, 1898-1951.
- Plitt, George. George Plitt papers. 1836-1873.
- Pollitzer, Anita, 1894-1975. Anita Pollitzer papers. 1921-1940.
- Poor, Alfred Easton, 1899-1988. Alfred Easton Poor papers, 1866-1985.
- Porter, Horace, 1837-1921. Horace Porter papers, 1853-1922.
- Post, Alice Thacher, 1853-1947. Alice Thacher Post papers.
- Post, Louis F. (Louis Freeland), 1849-1928. Louis F. Post papers, 1864-1940.
- Powell, E. Alexander (Edward Alexander), 1879- E. Alexander Powell papers, 1893-1957.
- Powell, Sophy Hulsizer, d. 1937. Sophy Hulsizer Powell papers.
- Pratt, Bela Lyon, 1867-1917. Bela Lyon Pratt papers, 1884-1918.
- Presbyterian Church in the U.S.A. Presbytery of Washington City. Presbyterian Church in the U.S.A. Presbytery of Washington City records, 1823-1950.
- Presbyterian Church in the U.S.A. Presbytery of Washington City records, 1823-1950.
- Preston family. Campbell-Preston-Floyd families papers, 1741-1931.
- Price family papers, 1854-1905.
- Price family. Price family papers, 1854-1905.
- Price, John H., fl. 1861-1865. John H. Price papers.
- Price, William George, 1833-1885. William George Price papers.
- Price, William George, 1867-1944. William George Price papers.
- Pritchett, Henry S. (Henry Smith), 1857-1939. Henry S. Pritchett correspondence. 1901-1910.
- Pritchett, Henry S. (Henry Smith), 1857-1939. Henry S. Pritchett papers, 1876-1967.
- Pritchett, Henry S. (Henry Smith), 1857-1939. What is religion? and other student questions; talks to college students. 1906.
- Puerto Rican memorial collection, 1519-1923.
- Pulitzer, Joseph, 1847-1911. Joseph Pulitzer papers, 1880-1924.
- Purdy, Ray Foote, 1889-1965. Ray Foote Purdy papers.
- Pusey, Merlo J. (Merlo John), 1902-1985. Merlo John Pusey papers.
- Putnam, Harrington, 1851-1937. Harrington Putnam papers, 1909-1928.
Q
R
- Rainey, Henry Thomas, 1860-1934. Henry Thomas Rainey papers, 1904-1934.
- Ralph Block papers, 1872-1971.
- Randall, J. G. (James Garfield), 1881-1953. J.G. Randall and Ruth Painter Randall papers, 1779-1970.
- Randall, Ruth Painter. J.G. Randall and Ruth Painter Randall papers. 1779-1970.
- Rash, Bryson B. Bryson B. Rash papers, 1918-1992.
- Rawleigh, William Thomas, 1870-1951. William Thomas Rawleigh papers, 1911-1931.
- Ray Eber Brown papers, 1915-1962.
- Ray Stannard Baker papers, 1836-1947.
- Raymond Clapper papers, 1908-1962.
- Raymond G. Carroll papers, 1905-1944.
- Raymond Leslie Buell papers, 1915-1981.
- Raymond Rubicam papers, 1921-1988.
- R.C. Leffingwell letterbooks, 1917-1920.
- Read family papers, 1568-1906.
- Read family. Read family papers, 1568-1906.
- Read, George, 1733-1798. George Read papers.
- Read, George, 1765-1836. George Read papers.
- Read, James, 1743-1822. James Read papers.
- Read, John, 1769-1854. John Read papers.
- Read, John M. (John Meredith), 1797-1874. John M. Read papers.
- Read, John Meredith, 1837-1896. John Meredith Read papers.
- Ream, Vinnie, 1847-1914. Vinnie Ream and Richard Leveridge Hoxie papers, 1853-1937.
- Rebekah Crawford and Linda Clarke-Smith papers, 1715-1929.
- Reeves, Arthur Middleton, 1856-1891. Arthur Middleton Reeves papers.
- Reeves, Mark E. Mark E. Reeves papers.
- Reginald Rowan Belknap papers, 1784-1929.
- Reich, Wilhelm, 1897-1957. Wilhelm Reich papers, 1920-1952.
- Reid, Elisabeth Mills, 1858-1931. Elisabeth Mills Reid papers.
- Reid family papers, 1795-1970.
- Reid family. Reid family papers, 1795-1970.
- Reid Foundation. Reid Foundation records. 1944-1958.
- Reid, Helen Rogers, 1882-1970. Helen Rogers Reid papers.
- Reid, Ogden Mills, 1882-1947. Ogden Mills Reid papers.
- Reid, Whitelaw, 1837-1912. Whitelaw Reid papers.
- Remey, Charles Mason, 1874-1974. Charles Mason Remey family papers, 1778-1949.
- Remey family. Charles Mason Remey family papers, 1778-1949.
- Remey, George Collier, 1841-1928. George Collier Remey papers.
- Remey, Mary Josephine Mason, 1845-1938. MaryJosephine Mason Remey papers.
- Republican campaign collection, 1902-1926.
- Reynolds, Joseph Jones, 1822-1899. Joseph Jones Reynolds papers.
- Reynolds, Juliana Smith. Juliana Smith Reynolds papers.
- Reynolds, Tilton C., 1843-1913. Tilton C. Reynolds papers, 1851-1963.
- Richard Olney papers, 1830-1928.
- Richards, Grant, 1872-1948. Grant Richards collection of A.E. Housman material, 1898-1947.
- Richardson, Holden Chester, 1878- Holden Chester Richardson papers, 1844-1946.
- Richardson, Nina Maud. Nina Maud Richardson papers.
- Richmond Pearson Hobson papers, 1889-1966.
- Rigby family. Tunnicliff, Rigby, and Staton families papers, 1854-1990.
- Riggs, Elisha, 1779-1853. Elisha Riggs papers. 1813-1896.
- Riggs, Elisha, 1826-1881. Elisha Riggs papers. 1844-1890.
- Riggs, Elisha Francis, 1851-1910. Elisha Francis Riggs papers. 1860-1910.
- Riggs, Elisha Francis, 1887-1936. Elisha Francis Riggs papers. 1887-1935.
- Riggs family papers, 1763-1945.
- Riggs family. Riggs family papers, 1763-1945.
- Riggs, George Washington, 1813-1881. George Washington Riggs papers. 1836-1881.
- Riggs, Romulus, 1782-1846. Romulus Riggs papers. 1821-1882.
- Riggs, T. Lawrason (Thomas Lawrason), 1888-1943. T. Lawrason Riggs papers. 1790-1943.
- Riggs, Thomas, 1873-1945. Thomas Riggs papers. 1887-1945.
- Riggs, William Henry, 1837-1924. William Henry Riggs papers. 1850-1912.
- Rihani, Ameen Fares, 1876-1940. Ameen Fares Rihani papers, 1897-1940.
- Riis, Jacob A. (Jacob August), 1849-1914. Jacob A. Riis papers, 1870-1990.
- Riis, Roger William, b. 1894. Roger William Riis papers, 1903-1990.
- Riley, James Whitcomb, 1849-1916. James Whitcomb Riley papers, 1883-1915.
- Robbins, Thomas H. (Thomas Hinckley), 1900-1972. Thomas H. Robbins papers, 1918-1971.
- Robert C. Ogden papers, 1843-1913.
- Robert E. Sherwood play scripts, 1921-1962.
- Robert H. Terrell papers, 1870-1954.
- Robert, Henry M. (Henry Martyn), 1837-1923. Henry M. Robert papers, 1853-1937.
- Robert Lansing papers, 1831-1935.
- Robert Latham Owen papers, 1910-1941.
- Robert Lee Bullard papers, 1881-1955.
- Robert Patterson Hughes papers, 1876-1994.
- Robert Staughton Lynd and Helen Merrell Lynd papers, 1895-1968.
- Robert Todd Lincoln family papers, 1864-1938.
- Robert Wickliffe Woolley papers, 1842-1956.
- Roberts family. Joseph J. Roberts family papers, 1839-2001.
- Roberts, Joseph J. (Joseph Jenkins), 1809-1876. Joseph J. Roberts family papers, 1839-2001.
- Robinson, Edwin Arlington, 1869-1935. Edwin Arlington Robinson papers, 1913-1940.
- Robles, Sebastian T. (Sebastian Tomas), 1902-1959. Sebastian T. Robles papers.
- Rodgers family papers, 1740-1987.
- Rodgers family papers, 1788-1944.
- Rodgers family. Rodgers family papers, 1740-1987.
- Rodgers family. Rodgers family papers, 1788-1944.
- Rodgers, John, 1773-1838. John Rodgers papers. (2)
- Rodgers, John, 1812-1882. John Rodgers papers.
- Rodgers, John, 1881-1926. John Rodgers papers.
- Rodgers, John Augustus, 1848-1933. John Augustus Rodgers papers.
- Rodgers, Minerva Denison, 1784-1877. Minerva Denison Rodgers papers.
- Rodgers, William Ledyard, 1860-1944. William Ledyard Rodgers papers.
- Rodolfo R. Schuller papers, 1492-1915.
- Roe, Gilbert E. (Gilbert Ernstein), 1865-1929. Papers of Gilbert E. Roe (1887-1961).
- Roger Welles papers, 1884-1926.
- Roger William Riis papers, 1903-1990.
- Rogers, Alfred Thomas, 1873-1948. Papers of Alfred Thomas Rogers (1900-1928).
- Rogers, Leighton W. (Leighton William), 1893-1962. Leighton W. Rogers papers, 1912-1982.
- Romanucci-Ross, Lola. Lola Romanucci-Ross papers.
- Roosevelt, Archibald, 1918-1990. Archibald Roosevelt papers.
- Roosevelt, Belle, 1892-1968. Kermit Roosevelt and Belle Roosevelt papers. 1885-1975.
- Roosevelt, Eleanor Butler, 1889-1960. Eleanor Butler Roosevelt papers.
- Roosevelt, Kermit, 1889-1943. Kermit Roosevelt and Belle Roosevelt papers, 1725-1975.
- Roosevelt, Theodore, 1858-1919. Theodore Roosevelt papers, 1759-1993.
- Roosevelt, Theodore, 1887-1944. Theodore Roosevelt papers, 1780-1962.
- Root, Elihu, 1845-1937. Elihu Root papers, 1863-1937.
- Roper, Laura Wood, 1911- Laura Wood Roper papers, 1822-1982.
- Rosa Freud Graf papers, 1879-1942.
- Rosamond Pinchot papers, 1918-1955.
- Ross A. Collins papers, 1906-1967.
- Roswell Randall Hoes papers, 1799-1912.
- Rotch, Abbott Lawrence, 1861-1912. Abbott Lawrence Rotch papers 1896-1912.
- Rouben Mamoulian papers, 1740-1987.
- Rowland V. Lee papers, 1907-1971.
- Roy Wilson Howard papers, 1911-1966.
- Royal Rodney Ingersoll and Royal E. Ingersoll papers, 1866-1935.
- R.R. Bowker papers, 1831-1931.
- Rubicam, Raymond, 1892-1978. Raymond Rubicam papers, 1921-1988.
- Rudolf Kolisch collection, 1921-1943.
- Rudolph Forster papers, 1898-1943.
- Russia miscellany, 1759-1928.
- Russian Orthodox Greek Catholic Church of America. Diocese of Alaska records, 1733-1938.
- Russian Orthodox Greek Catholic Church of America. Diocese of Alaska. Russian Orthodox Greek Catholic Church of America. Diocese of Alaska records, 1733-1938.
S
- Samuel Chiles Mitchell papers, 1903-1913.
- Samuel Franklin Emmons papers, 1725-1914.
- Samuel McGowan papers, 1883-1943.
- Samuel P. Warren collection, 1840-1950.
- Samuel W. Dike papers, 1870-1913.
- Samuel Whittemore Boggs papers, 1912-1954.
- Sanders, Everett, 1882-1950 Everett Sanders papers, 1913-1950.
- Sándor Lorand papers, 1914-1978.
- Sarah Stone autograph collection, 1720-1962.
- Sardeau, Hélène, 1899-1969. Hélène Sardeau papers.
- Sargent, Harry N. Harry N. Sargent papers, 1917-1920.
- Sargent, Nathan, 1849-1907. Nathan Sargent papers, 1866-1957.
- Sayers, Isabelle S. Papers from the Isabelle Sayers collection, circa 1886-1980.
- Sayre, Francis Bowes, 1885-1972. Francis Bowes Sayre papers, 1861-1967.
- Schnabel, Artur, 1882-1951. Artur Schnabel collection.
- Schnabel, Artur, 1882-1951. Artur Schnabel collection, 1899-1950.
- Schnabel, Artur, 1882-1951. Mary Virginia Foreman Le Garrec collection of Artur Schnabel materials. 1893-1996.
- Schneider, J. Thomas (John Thomas), 1895-1976. J. Thomas Schneider papers, 1915-1960.
- Schuller, Rodolfo R., 1873-1932. Rodolfo R. Schuller papers, 1492-1915.
- Schur, Max. Max Schur papers, 1923-1974.
- Schurz, Carl, 1829-1906. Carl Schurz papers, 1842-1983.
- Schwartz, Theodore. Theodore Schwartz papers.
- Scott, Hugh Lenox, 1853-1934. Hugh Lenox Scott papers, 1582-1981.
- Scott, William McKendree, 1817-1861. William McKendree Scott papers. 1845.
- Scudder Klyce papers, 1911-1933.
- See, T. J. J. (Thomas Jefferson Jackson), b. 1866. T.J.J. See papers, 1887-1960.
- Selman A. Waksman papers, 1915-1960.
- Serge Diaghilev/Serge Lifar collection, 1750-1950.
- Serge Grigoriev/Ballets Russes archive, 1909-2009.
- Serge Koussevitzky archive, 1920-1976.
- Sergius Pankejeff papers, 1901-1979.
- Shaker collection of records concerning the United Society of Believers in Christ's Second Appearing, 1676-1937.
- Sheets, Henry Harrison. Henry Harrison Sheets papers.
- Sheldon, Mary French, 1847-1936. Mary French Sheldon papers, 1885-1938.
- Shepherd, William R. (William Robert), 1871-1934. William R. Shepherd papers, 1554-1931.
- Sherwood, Robert E. (Robert Emmet), 1896-1955. Robert E. Sherwood play scripts, 1921-1962.
- Shippen, Alice Lee, 1736-1817. Alice Lee Shippen papers.
- Shippen, Edward, 1826-1911. Edward Shippen papers.
- Shippen family papers, 1671-1936.
- Shippen family. Shippen family papers, 1671-1936.
- Shippen, Thomas Lee, 1765-1798. Thomas Lee Shippen papers. (2)
- Shippen, William, 1712-1801. William Shippen papers.
- Shippen, William, 1736?-1808. William Shippen papers.
- Shuster, W. Morgan (William Morgan), 1877-1960. W. Morgan Shuster papers, 1900-1964.
- Sickles, Daniel Edgar, 1819-1914. Daniel Edgar Sickles papers, 1821-1918.
- Sidell, William Henry, 1810-1873. William Henry Sidell papers. 1849.
- Sigmund Freud papers, circa 6th century B.C.-1998.
- Silas Casey papers, 1771-1941.
- Simms, Ruth Hanna McCormick, 1880-1944. Ruth Hanna McCormick Simms papers.
- Simons, Alfred E. Alfred E. Simons papers.
- Simons family papers, 1887-1982.
- Simons family. Simons family papers, 1887-1982.
- Simons, William H., 1881-1938. William H. Simons papers.
- Simons, William H., 1924- William H. Simons papers.
- Sims, Anne Hitchcock, 1875-1960. Anne Hitchcock Sims papers.
- Sims, William Sowden, 1858-1936. William Sowden Sims papers, 1856-1951.
- Sirch, Charles W. Charles W. Sirch papers, 1878-1935.
- Sisson, Nathaniel, 1845-1932. Nathaniel Sisson papers, 1838-1932.
- Slonimsky, Nicolas, 1894-1995. Nicolas Slonimsky collection, 1873-1997.
- Smith, Charles Perley, 1878-1948. Charles Perley Smith papers, 1920-1946.
- Smith Ely Jelliffe papers, 1882-1977.
- Smith, Erwin F. (Erwin Frink), 1854-1927. Erwin F. Smith papers, 1876-1927.
- Smith, Herbert A. (Herbert Augustine), 1866-1944. Herbert A. Smith papers.
- Smith, Horatio Davis, 1845-1918. Horatio Davis Smith papers.
- Smith, Logan Pearsall, 1865-1946. Logan Pearsall Smith papers, 1760-1946.
- Snow, Elliot, 1866-1939. Elliot Snow papers, 1790-1942.
- Society of Woman Geographers records, 1925-1998.
- Society of Woman Geographers. Society of Woman Geographers records, 1925-1998.
- Solomon, Hannah G. (Hannah Greenebaum), 1858-1942. Hannah G. Solomon papers, 1817-1986.
- Solon Hannibal Borglum papers, 1886-1969.
- Sperry, Charles S. (Charles Stillman), 1847-1911. Charles S. Sperry papers, 1862-1912.
- Spingarn, Arthur B. (Arthur Barnett), 1878-1971. Arthur B. Spingarn papers, 1850-1968.
- Stanford Caldwell Hooper papers, 1899-1955.
- Stanton, Elizabeth Cady, 1815-1902. Elizabeth Cady Stanton papers, 1814-1946.
- Staton family. Tunnicliff, Rigby, and Staton families papers, 1854-1990.
- Stedman, Edmund Clarence, 1833-1908. Edmund Clarence Stedman papers, 1871-1923.
- Stephen Bleecker Luce papers, 1799-1955.
- Stephen Bonsal papers, 1890-1973.
- Stephenson, John Aldrich. John Aldrich Stephenson collection of the Hand, Fiske, and Aldrich families papers. 1745-1966.
- Stephenson, Nathaniel W. (Nathaniel Wright), 1867-1935. Nathaniel W. Stephenson papers.
- Stevenson, Burton Egbert, 1872-1962. Burton Egbert Stevenson papers, 1900-1951.
- Stewart, Emily A. Emily A. Stewart collection of Elihu Root material, 1885-1959.
- Stone, Irving, 1903-1989. Irving Stone papers.
- Stone, Sarah, fl. 1840. Sarah Stone autograph collection, 1720-1962.
- Storey, Moorfield, 1845-1929. Moorfield Storey papers, 1876-1929.
- Stotesbury collection of World War I clippings, 1914-1918.
- Stotesbury, Eva Roberts Cromwell. Stotesbury collection of World War I clippings, 1914-1918.
- Stout, Wesley Winans, 1890- Wesley Winans Stout papers, 1913-1954.
- Straus, Oscar S. (Oscar Solomon), 1850-1926. Oscar S. Straus papers, 1856-1955.
- Strauss, Joseph, 1861-1948. Joseph Strauss papers, 1884-1949.
- Sullivan, Mark, 1874-1952. Mark Sullivan papers, 1900-1935.
- Sunday, Billy, 1862-1935. William L. Daley collection relating to Billy Sunday, 1914-1925.
- Susan B. Anthony Foundation (Washington, D.C.) records, 1895-1943.
- Susan B. Anthony Foundation (Washington, D.C.). Susan B. Anthony Foundation (Washington, D.C.) records, 1895-1943.
- Susan B. Anthony papers, 1846-1934.
- Sutherland, George, 1862-1942. George Sutherland papers, 1850-1944.
- Swisher, Carl Brent, 1897-1968. Carl Brent Swisher collection of research materials relating to Roger B. Taney, 1836-1962.
- Symington, Evelyn Wadsworth, 1903-1972. Evelyn Wadsworth Symington collection of John Hay material, 1864-1905.
T
- T. S. Palmer papers, 1877-1954.
- T. Swann Harding papers, 1918-1963.
- Tabor, Edward Otto, 1885-1948. Edward Otto Tabor papers, 1918-1948.
- Taft, Alphonso, 1810-1891. Alphonso Taft papers.
- Taft, Helen Herron, 1861-1943. Helen Herron Taft papers.
- Taft, Louise Maria Torrey, 1827-1907. Louise Maria Torrey Taft papers.
- Taft, William H. (William Howard), 1857-1930. William H. Taft papers, 1784-1973.
- Taft, William Howard, 1915 Aug. 7- William Howard Taft papers, 1915-1953.
- Talcott, Charles G. (Charles Gratiot) Charles G. Talcott papers.
- Talcott, Theodosia L. Theodosia L. Talcott papers.
- Tams-Witmark collection, 1701-1915.
- Tams-Witmark-Princeton collection.
- Tanner, Benj. T. (Benjamin Tucker), 1835-1923. Benjamin T. Tanner papers. 1827-1872.
- Taylor, Montgomery Meigs, 1869-1952. Montgomery Meigs Taylor papers, 1890-1935.
- Taylor, Zachary, 1784-1850. Zachary Taylor papers, 1814-1931.
- Tee-Van, Helen Damrosch, 1893-1976. Damrosch - Tee Van Collection. 1856-1969.
- Terhune, Albert Payson, 1872-1942. Albert Payson Terhune papers, 1890-1957.
- Terrell, Mary Church, 1863-1954. Mary Church Terrell papers, 1851-1962.
- Terrell, Robert H. (Robert Heberton), 1857-1925. Robert H. Terrell papers, 1870-1954.
- T.H. Gallaudet and Edward Miner Gallaudet papers, 1806-1958.
- Theo. A. Bingham papers, 1897-1903.
- Theodore Gordon Ellyson papers, 1912-1951.
- Theodore Marburg papers, 1859-1940.
- Theodore Roosevelt papers, 1759-1993.
- Theodore Roosevelt papers, 1780-1962.
- Theodore Stark Wilkinson papers, 1893-1962.
- Thomas A. Edison, Inc. Edison sheet music collection, 1830-1958.
- Thomas Bailey Aldrich papers, 1873-1901.
- Thomas Capek collection of materials relating to Czechoslovakia and Czech Americans, 1619-1953.
- Thomas H. Ince papers, 1913-1964.
- Thomas H. Robbins papers, 1918-1971.
- Thomas Henry Carter papers, 1883-1917.
- Thomas Kimmwood Peters papers, 1896-1973.
- Thomas Mann papers, 1909-1947.
- Thomas Sidney Jesup papers, 1780-1907.
- Thomas T. Craven papers, 1842-1969.
- Thomas Watt Gregory papers, 1896-1933.
- Thomsen, Alice Barnard, 1912- Baldwin-Ziegler Polar Expedition history. circa 1993.
- Thorndike, Edward L. (Edward Lee), 1874-1949. Edward L. Thorndike papers, 1900-1938.
- Thorndike, Edward L. (Edward Lee), 1874-1949. Semantic count of English words. 1938.
- Ticknor, Benjamin Holt, 1842-1914. Benjamin Holt Ticknor papers, 1595-1935.
- Ticknor, Caroline, 1866-1937. Caroline Ticknor papers.
- Tilton C. Reynolds papers, 1851-1963.
- Tissandier, Albert, 1839-1906. Tissandier collection on the history of aeronautics. 1539-1929.
- Tissandier collection on the history of aeronautics, 1539-1929.
- Tissandier, Gaston, 1843-1899. Tissandier collection on the history of aeronautics, 1539-1929.
- Tissandier, Paul, b. 1881. Tissandier collection on the history of aeronautics. 1539-1929.
- T.J.J. See papers, 1887-1960.
- T.M. Cleland papers, 1880-1964.
- Tom J. Geraghty papers, 1923-1965.
- Tompkins, Daniel Augustus, 1851-1914. Daniel Augustus Tompkins papers, 1887-1920.
- Torrey, Delia C. Delia C. Torrey papers.
- Tournemire, Charles, 1870-1939. Charles Tournemire collection, circa 1868-1962.
- Towers, John H. (John Henry), 1885-1955. John H. Towers papers, 1830-1989.
- Towers, Pierrette Anne. Pierrette Anne Towers papers.
- Towers, William M. William M. Towers papers.
- Train, Charles Russell, 1879-1967. Charles Russell Train papers, 1898-1967.
- Traubel, Anne Montgomerie, 1864-1954. Anne Montgomerie Traubel papers.
- Traubel, Anne Montgomerie, 1864-1954. Horace Traubel and Anne Montgomerie Traubel papers. 1824-1979.
- Traubel, Gertrude. Gertrude Traubel papers. 1880-1979.
- Traubel, Horace, 1858-1919. Horace Traubel and Anne Montgomerie Traubel papers, 1824-1979.
- Traubel, Horace, 1858-1919. Horace Traubel papers.
- Truxtun, Thomas, 1755-1822. Thomas Truxton papers.
- Tucker, George Edwin. George Edwin Tucker papers.
- Tucker, Mary Logan, b. 1860 or 61. Mary Logan Tucker papers.
- Tumulty, Joseph P. (Joseph Patrick), 1879-1954. Joseph P. Tumulty papers, 1898-1969.
- Tunnicliff family. Tunnicliff, Rigby, and Staton families papers, 1854-1990.
- Tunnicliff, Rigby, and Staton families papers, 1854-1990.
- Turner, Justin G. Justin G. Turner autograph collection, 1763-1968.
- Twitchell, Kenaston. Kenaston Twitchell papers.
- Tyler Dennett collection relating to John Hay, 1861-1937.
- Tyler, John, 1790-1862. John Tyler papers, 1691-1918.
- Tyler, Julia Gardiner, 1820-1889. Julia Gardiner Tyler papers.
- Tyler, Lyon Gardiner, 1853-1935. Lyon Gardiner Tyler papers.
U
- Underwood, Norman, b. 1878. Norman Underwood papers.
- Underwood, Wilbur, 1876-1935. Wilbur Underwood papers, 1895-1969.
- United States. American Commission to Negotiate Peace. U.S. American Commission to Negotiate Peace records, 1898-1919.
- United States Constitution collection, 1773-1944.
- United States. Federal Trade Commission. United States. Federal Trade Commission records. 1914-1934.
- United States. Forest Service records, 1902-1953.
- United States. Forest Service. United States. Forest Service records, 1902-1953.
- United States. National Advisory Committee for Aeronautics. United States. National Advisory Committee for Aeronautics records.
- United States. President's Research Committee on Social Trends. U.S. President's Research Committee on Social Trends records, 1924-1936.
- Untermeyer-Frost collection, 1913-1964.
- Untermeyer, Louis, 1885-1977. Untermeyer-Frost collection, 1913-1964.
- Ursinus, Oskar. Oskar Ursinus papers, 1908-1943.
- U.S. American Commission to Negotiate Peace records, 1898-1919.
- U.S. President's Research Committee on Social Trends records, 1924-1936.
V
- Van Deurs, George, 1901-1984. George Van Deurs papers, 1851-1982.
- Van Devanter, Willis, 1859-1941. Willis Van Devanter papers, 1884-1941.
- Van Doren, Irita Taylor, 1891-1966. Irita Taylor Van Doren papers, 1920-1967.
- Van Voorhis, Daniel. Daniel Van Voorhis correspondence and reports. 1911-1913.
- Van Voorhis, Edith Burbank. Edith Burbank Van Voorhis correspondence. 1911-1913.
- Van Voorhis family. Burbank-Van Voorhis families papers, 1814-1913.
- VanderPoel, Halsted B. Halsted B. VanderPoel literary collection, 1815-1929.
- Veblen, Oswald, 1880-1960. Oswald Veblen papers, 1881-1960.
- Verdon, Gwen. Bob Fosse and Gwen Verdon collection. 1920-1991.
- Vernon Boyce Hampton papers, 1872-1971.
- Vernon Duke collection, 1918-1968.
- Vetter, Helen Cook. Helen Cook Vetter papers. 1910-1977.
- Victor Herbert collection, 1880-1939.
- Victor Murdock papers, 1824-1971.
- Victor S. Clark papers, 1827-1944.
- Vinnie Ream and Richard Leveridge Hoxie papers, 1853-1937.
- Visual materials from the Blackwell family papers.
- Visual materials from the Booker T. Washington papers. (2)
- Visual materials from the Jim Walsh collection.
- Visual materials from the National Association for the Advancement of Colored People records (Library of Congress).
- Visual materials from the records of the National Woman's Party. (2)
- Vitte, S. I︠U︡. (Sergeĭ I︠U︡lʹevich), graf, 1849-1915. Graf Sergeĭ I︠U︡lʹevich Vitte letter. 1893.
- Voge, Adolph Law. Adolph Law Voge papers, 1915-1939.
- Volkogonov, Dmitriĭ Antonovich. Dmitriĭ Antonovich Volkogonov papers, 1887-1995.
- Von Recum family. Howard-von Recum family papers, 1869-1972.
- Von Recum, Marie Ernestine Howard, Baroness, 1868-1954. Marie Ernestine Howard von Recum correspondence and diaries.
- Von Tilzer / Gumm collection, 1878-1959.
- Von Tilzer, Harry, 1872-1946. Von Tilzer / Gumm collection, 1878-1959.
- Vozdushnye puti records, 1923-1967.
W
- W. Averell Harriman papers, 1869-1988.
- W. Cameron Forbes papers, 1904-1946.
- W J McGee papers, 1880-1916.
- W. Morgan Shuster papers, 1900-1964.
- W. Somerset Maugham papers, 1897-1966.
- Waddy B. Wood papers, 1885-1941.
- Wade Hampton family papers, 1855-1935.
- Wade, Joseph Sanford, b. 1880. Joseph Sanford Wade papers, 1898-1955.
- Wadsworth family. James Wadsworth family papers, 1730-1959.
- Wadsworth, James, 1768-1844. James Wadsworth family papers, 1730-1959.
- Wadsworth, James S. (James Samuel), 1807-1864. James S. Wadsworth papers.
- Wadsworth, James Wolcott, 1846-1926. James Wolcott Wadsworth papers.
- Wadsworth, James Wolcott, 1877-1952. James Wolcott Wadsworth papers.
- Wadsworth, William, 1761-1833. William Wadsworth papers.
- Waksman, Selman A. (Selman Abraham), 1888-1973. Selman A. Waksman papers, 1915-1960.
- Walker, William Holmes, 1820-1908. William Holmes Walker papers, 1855-1982.
- Wallace H. White papers, 1915-1948.
- Walsh, Jim, 1903-1990. Papers from the Jim Walsh collection, 1867-1987, and undated.
- Walt Whitman papers in the Charles E. Feinberg collection, 1763-1985.
- Walter Francis Willcox papers, 1851-1965.
- Ward, Lester Frank, 1841-1913. Lester Frank Ward papers, 1883-1906.
- Warren, Charles, 1868-1954. Charles Warren papers, 1874-1954.
- Warren, Fiske, 1862-1938. Warren Fiske diary excerpts.
- Warren G. Child papers, 1907-1942.
- Warren K. Billings papers, 1899-1973.
- Warren, Samuel P. (Samuel Prowse), 1841-1915. Samuel P. Warren collection, 1840-1950.
- Washington, Booker T., 1856-1915. Booker T. Washington papers.
- Washington, Booker T., 1856-1915. Booker T. Washington papers, 1853-1946.
- Washington, Booker T., 1856-1915. Visual materials from the Booker T. Washington papers.
- Washington Irving Chambers papers, 1871-1943.
- Waters, Asa H. (Asa Holman), 1808-1887. Asa H. Waters papers.
- Waters, Elizabeth. Elizabeth Waters papers.
- Watterson, Henry, 1840-1921. Henry Watterson papers, 1863-1920.
- Weik, Jesse William, 1857-1930. Jesse William Weik papers. 1830-1927.
- Weiss, Edoardo, 1889-1970. Edoardo Weiss papers, 1919-1970.
- Welles, Harriet Ogden Deen. Harriet Ogden Deen Welles diary. 1910.
- Welles, Roger, 1862-1932. Roger Welles papers, 1884-1926.
- Wells, Philip P. (Philip Patterson), 1868-1929. Philip P. Wells papers.
- Wendell Berge papers, 1907-1950.
- Wesley Winans Stout papers, 1913-1954.
- West, Helen Hunt, b. 1892. Helen Hunt West papers. 1917-1963.
- Wetmore, George Peabody, 1846-1921. George Peabody Wetmore papers, 1885-1916.
- Whitall, Ann Cooper, 1716-1797. Ann Cooper Whitall papers.
- White, Henry, 1850-1927. Henry White papers, 1812-1931.
- White, Margaret Stuyvesant Rutherford, 1857-1916 Margaret Stuyvesant Rutherford White papers.
- White, Wallace H. (Wallace Humphrey), b. 1877. Wallace H. White papers, 1915-1948.
- White, William Allen, 1868-1944. William Allen White papers, 1859-1944.
- Whiting, John D. (John David), 1882-1951 John D. Whiting papers, 1890-1970.
- Whitlock, Brand, 1869-1934. Brand Whitlock papers, circa 1890-1934.
- Whitman Bassow papers, 1920-1990.
- Whitman, Walt, 1819-1892. Walt Whitman notes. 1850.
- Whitman, Walt, 1819-1892. Walt Whitman papers.
- Whitman, Walt, 1819-1892. Walt Whitman papers in the Charles E. Feinberg collection. 1806-1981.
- Whitney, Harry Payne, 1872-1930. Harry Payne Whitney collection of letters of William Collins Whitney. 1757-1942.
- Whitney, William C. (William Collins), 1841-1904. Harry Payne Whitney collection of letters of William Collins Whitney, 1757-1942.
- Whitney, William C. (William Collins), 1841-1904. Visual materials from the Harry Payne Whitney collection of letters of William Collins Whitney.
- Wickes, Frances G. (Frances Gillespy), 1875-1967. Frances G. Wickes papers, 1896-1996.
- Wiksell, Gustave Percival. Gustave Percival Wiksell papers, 1855-1939.
- Wilbur J. Carr papers, 1892-1942.
- Wilbur Underwood papers, 1895-1969.
- Wilbur Wright and Orville Wright papers, 1809-1979.
- Wilder, Marshall P. (Marshall Pinckney), 1859-1915. Marshall P. Wilder papers, 1880-1914.
- Wile, Frederic William, 1873-1941. Frederic William Wile scrapbooks, 1898-1941.
- Wiley, Harvey Washington, 1844-1930. Harvey Washington Wiley papers, 1854-1954.
- Wilhelm Fliess papers, 1894-1929.
- Wilhelm Reich papers, 1920-1952.
- Wilkinson, Theodore Stark, 1888-1946. Theodore Stark Wilkinson papers, 1893-1962.
- Willard, Antonia Ford, 1838-1871. Antonia Ford Willard papers.
- Willard, Belle Layton Wyatt, 1873-1954. Belle Layton Wyatt Willard papers.
- Willard family papers, 1800-1968.
- Willard family. Willard family papers, 1800-1968.
- Willard H. Brownson papers, 1859-1932.
- Willard, Joseph Clapp, 1820-1897. Joseph Clapp Willard papers.
- Willard, Joseph Edward, 1865-1924. Joseph Edward Willard papers.
- Willcox, Walter Francis, 1861-1964. Walter Francis Willcox papers, 1851-1965.
- Willebrandt, Mabel Walker, 1889-1963. Mabel Walker Willebrandt papers, 1881-1978.
- William A. Benney papers, 1920-1966.
- William Allen White papers, 1859-1944.
- William Banks Caperton papers, 1873-1939.
- William Dawson Johnston papers, 1842-1927.
- William Dudley Foulke papers, circa 1470-1952.
- William E. Chandler papers, 1863-1917.
- William E. Humphrey papers, 1903-1936.
- William Edgar Borah papers, 1905-1940.
- William Edward Dodd papers, 1895-1955.
- William F. Fullam papers, 1873-1942.
- William Goodell papers, 1818-1917.
- William H. Emory papers, 1877-1948.
- William H. Taft papers, 1784-1973.
- William Henry Allison diaries, 1868-1940.
- William Holmes Walker papers, 1855-1982.
- William Howard Taft papers, 1915-1953.
- William H.P. Blandy papers, 1913-1977.
- William Jennings Bryan papers, 1877-1940.
- William L. Daley collection relating to Billy Sunday, 1914-1925.
- William LePre Houston family papers, 1777-1936.
- William Marion Jardine papers, 1908-1955.
- William McKinley papers, circa 1847-1935.
- William O. Douglas papers, 1801-1980.
- William Orr papers, 1890-1939.
- William R. Day papers, 1820-1923.
- William R. Shepherd papers, 1554-1931.
- William Shepherd Benson papers, circa 1791-1952.
- William Smith Culbertson papers, 1897-1965.
- William Sowden Sims papers, 1856-1951.
- William Thomas Rawleigh papers, 1911-1931.
- William W. Coblentz papers, 1883-1960.
- Williams College. Institute of Politics. Williams College. Institute of Politics records. 1926-1932.
- Williams, John Sharp, 1854-1932. John Sharp Williams papers, 1902-1924.
- Willis, Edward, 1834-1910. Edward Willis papers, 1854-1906.
- Willis Van Devanter papers, 1884-1941.
- Willkie, Wendell L. (Wendell Lewis), 1892-1944. Wendell L. Willkie papers.
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Y
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