- 144th Regiment Militia (Va.) Order Book, 1834/18431
- A. H. Hand Papers, 1835/20091
- A.B. Stickney, Compiler, Genealogical Materials, 1838/19591
- A.C.L. Gatewood Papers, 1801/19191
- A.J. Morrison Collection, 1754/19751
- Abner Johnson Leavenworth Papers, 1825/18611
- Abolitionist Movement Collection, 1834/18881
- Abraham Grove Account Book, 1815/18501
- Account Book, 1838/18391
- Account Books, 1782/18951
- Accounts, 19th Century, 1836/18971
- Adam Empie Papers, 1811/2004, bulk 1811/18501
- Adam Rinica and George Rinica Account Book, 1822/18481
- Adams Papers, 1782/18901
- Addie Rogers Bound Sheet Music Collection, 1827/18601