- A. Glass Account Book, 1844/18621
- A. H. Hand Papers, 1835/20091
- A. Miley Journal, 1843/18451
- Abner Johnson Leavenworth Papers, 1825/18611
- Abolitionist Movement Collection, 1834/18881
- Abraham Grove Account Book, 1815/18501
- 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
- Alabama Collection, 1823/18931
- Alexander Brown Papers (I), 1815/19101
- Alexander Brown Papers (II), 1748/19001
- Alexander Hugh Holmes Stuart Account Books, 1837/18571