- "Brother Rat" collection, 1934/19391
- 1st New York Mounted Rifles letter, 18641
- A. Eliza Crane letter, 18541
- A. Franklin Kibler papers, 1943/19521
- A. H. Hand Papers, 1835/20091
- A. K. Leake Papers, 1872/19401
- A. L. McLeod Papers, 1964/19661
- A. Willis Robertson Papers, 1921/1988, bulk 1946/19661
- Abner Johnson Leavenworth Papers, 1825/18611
- Abolitionist Movement Collection, 1834/18881
- Abraham Anson papers, 1939/20051
- Adams Papers, 1782/18901
- Addison Family Papers, 1890/18991
- Adee Family Papers, 1862/18651
- Admission Scholarship from Washington College to the sons of Mary Jackson Thornton, 18661