Collection
- Abner Osburn, Physician, Papers1
- Abraham Lincoln Collection1
- Account Books2
- Account Ledger and Diary (Upstate New York)2
- Accounts, 19th Century1
- Acker Family Diaries5
- Ackerly Family Papers4
- Adalbert J. Volck Collection of Etchings3
- Adam Empie Papers3
- Adams Papers2
- Adele Goodman Clark papers4
- Adin B. Underwood Papers,2
- Administration records collection21
- Admiral John Randolph Tucker Papers5
- Adolphus DeBussey, Soldier, Civil War Letters2