- "Three solos for the violoncello with accompaniment for a bass" by Johan Arnold Dahmen music manuscript, 17941
- 17th and 18th century British periodicals, 1600/18001
- 1828 Catalogue Project digital image collection, 2012/20192
- A Calendar of The Jefferson Papers of the University of Virginia20
- A. E. Dick Howard papers, 1928/20171
- A. Willis Robertson Papers, 1921/1988, bulk 1946/19661
- A.J. Morrison Collection, 1754/19751
- Account Books, 1782/18951
- Adams Papers, 1782/18902
- Administration records collection, 1776/19764
- Admiral John Randolph Tucker Papers, 1865/18973
- Adolphus Weir Account Book, 1790/18062
- Advisory Committee Research Collection, 1772/201710
- Aggregate Fund orders and vouchers of the Virginia Auditor of Public Accounts, 1788/18121
- Alderman family papers, 1779/19612