- A.S. Hammack papers, 1864/19541
- Account Books, 1782/18951
- Ackerly Family Papers5
- Adele Goodman Clark papers, 1849/19781
- Alexander & Wunder Account Book, 1884/18871
- Alexander Brown Papers (I), 1815/19103
- Alexander Family Papers
1800-18908
- Alexander Haight family collection, 1764/197711
- Alexander Von Humboldt Portrait Print, 1855/18901
- Alexandria Black Family Reunion Digital Collection, 1937/20051
- Alfred C. Garnett, Jr. Papers
1868-19453
- Alfred Spates Papers
1843-19093
- Alice and Phoebe Cary Collection
1858-18901
- Allen-Kean-Laurence family letters, 1837/19601
- Andrew Jackson Davis Collection, 1840/20111