Collection
- Albert D. Noble, Jr., Glass Negatives Collection, 1885-19101
- Albert E. St. Germain collection, 1894-1964 (majority within 1917-1919)1
- Albert F. Gudatt journal, 1898-1904 (majority within 1898-1902)1
- Albert J. Schimpke collection of R.G. Peters materials, 1890-circa 19702
- Albert Joseph Engel Papers, 1885-19602
- Albert Kahn Associates records, 1825-2014 (majority within 1900-1945)27
- Albert Kahn Family papers, 1869-19896
- Albert M. Barrett papers, 1900-19371
- Albert Robinson Crittenden papers, 1868-19334
- Aldred Scott Warthin papers, 1893-1947 (majority within 1923-1931)6
- Alexander G. Ruthven Papers, 1901-1961 (majority within 1906-1951)8
- Alexander Thompson papers, 1793-19321
- Alexander family papers, [1863]-1969 (majority within 1894-1927)3
- Alfred G. Meyer Papers, circa 1860-1998 (majority within 1930s-1970s)2
- Alfred H. Lloyd papers, 1879-19261
- Alfred Isaac Sawyer papers, 1848-19313
- Alfred Noble Papers, 1863-19225
- Algernon Charles Swinburne Collection, 1839-1981 (majority within 1860-1930)4
- Alice Petersen photograph collection, circa 1900s2
- Allaire-Gibbons papers, 1822-1963 (majority within 1822-1856)2