- Absalom See Account Books, 1854/18691
- Account Book Including Recipes and Home Remedies, 1856/18691
- Account Books, 1782/18951
- Account book (N.H.), 1856/18741
- Accounts, 19th Century, 1836/18971
- Adalbert J. Volck Collection of Etchings, 1861/19791
- Adam Empie Papers, 1811/2004, bulk 1811/18501
- Adams Papers, 1782/18901
- Adelaide Colcock Papers, 1863/18701
- Adele Goodman Clark papers, 1849/19781
- Adin B. Underwood Papers,, 1861/19261
- Administration records collection, 1776/19761
- Admiral John Randolph Tucker Papers, 1865/18971
- Adolphus DeBussey, Soldier, Civil War Letters, 1861/1998, bulk 1861/18711
- Adolphus P. Howard Papers, 1850/19381