- "Justus ut palma a 3 Canto e Alto e Basso" manuscript, 1800/18251
- A.C.L. Gatewood Papers, 1801/19191
- A.J. Morrison Collection, 1754/19751
- Abraham Davenport Ledger, 1804/18331
- Account Books, 1782/18951
- Adam Empie Papers, 1811/2004, bulk 1811/18501
- Adams Papers, 1782/18901
- Administration records collection, 1776/19761
- Albert R. Gallatin papers, 1795/18281
- Alderman family papers, 1779/19611
- Alexander Balmaine Memorandum Book, 1775/18201
- Alexander Brown Papers (II), 1748/19001
- Alexander Campbell (1788-1866) Papers, 1808/18141
- Alexander Haight family collection, 1764/19761
- Alexander Haight family collection, 1764/19771