- "A New Atlas of the British West Indies" bound volume, 18061
- "Justus ut palma a 3 Canto e Alto e Basso" manuscript, 1800/18251
- A Map of the Rapids of the Ohio River and of the Counties on Each Side Thereof, So Far, as to Include the Routes Contemplated for Canal Navigation (reproduction), 18061
- A.C.L. Gatewood Papers, 1801/19191
- A.J. Morrison Collection, 1754/19751
- Abraham Davenport Ledger, 1804/18331
- Account Books, 1782/18951
- Adams Papers, 1782/18901
- Administration records collection, 1776/19761
- Adolphus Weir Account Book, 1790/18061
- Advisory Committee Research Collection, 1772/20171
- Aggregate Fund orders and vouchers of the Virginia Auditor of Public Accounts, 1788/18121
- Albert R. Gallatin papers, 1795/18281
- Alderman family papers, 1779/19611
- Alexander Balmaine Memorandum Book, 1775/18201