Collection
- Abner Osburn, Physician, Papers1
- Abraham Lincoln Collection1
- Account Booklets with John W. Crist2
- Account Ledger and Diary (Upstate New York)2
- Accounts, 19th Century1
- Acker Family Diaries5
- Ackerly Family Papers5
- Adalbert J. Volck Collection of Etchings4
- Adam Empie Papers2
- Adam Finch Collection2
- Adam T. Finch Papers2
- Addison Family Papers2
- Adele Goodman Clark papers10
- Adin B. Underwood Papers,2
- Administration records collection18