- 17th and 18th century British periodicals, 1600/18001
- A.J. Morrison Collection, 1754/19751
- Alexander Brown Papers (II), 1748/19001
- Alexandria, Virginia City Records (MS019), 1750/1983, bulk 1825/18751
- Anderson Family papers, 1755/19581
- Anna Burton Ellett Collection, 1751/19321
- Anne Atkinson Chamberlayne Collection., 1742/19631
- Armistead Papers, 1736/18971
- Armistead-Cocke Papers, 1680/19171
- Ashcraft Family Genealogy, 1732/19721
- Association for the Preservation of Virginia Antiquities, Montgomery County Branch Papers, 1754/1996, bulk 1958/19831
- Aurora, Preston County Papers, 1754/19001
- Baer Family Papers, 1744/19291
- Baird Family Papers, 1656/1922, bulk 1656/18481
- Bakers' Guild Bylaws and Register (Harburg, Germany), 1668/18091