- Adelaide Colcock Papers, 1863/18701
- Adin B. Underwood Papers,, 1861/19261
- Aileen B. Cowardin Friendship Book,, 1863/18701
- Alexander Farish Robertson Papers, 1867/19311
- Alexander McNutt Glasgow Family Papers, 1823/19031
- Alexander Von Humboldt Portrait Print, 1855/18901
- Andrew Given Family Correspondence, 1859/18861
- Andrew Johnson Check, 18681
- Ann A. Hertzler Collection, 1863/2013, bulk 1974/20001
- Anna Burton Ellett Collection, 1751/19321
- Antoine Gaujot and Julien E. Gaujot Papers, 1840/19991
- Association for the Preservation of Virginia Antiquities, Montgomery County Branch Papers, 1754/1996, bulk 1958/19831
- August Dietz Civil War Collection,, 1862/19091
- Augustus Smith Family Collection, 1864/19261
- Azoic and Paleozoic Formations Including the Iron-Ore and Limestone Districts, 18681