- 15th Virginia Infantry History, 1861/18641
- 17th Precinct (The Bowery), New York City Police Blotter, 18611
- 42nd Virginia Infantry Muster and Descriptive Roll, 1861/18621
- A New Bird's Eye View of the Seat of War, 18611
- A. E. Wood Letter, 18611
- Adin B. Underwood Papers, 1861/19263
- Alexander Floyd Wall Correspondence, 1861/18651
- Alexander H. Davidson Letter, 18611
- Alexander Welch Reynolds Letter, 18611
- Alexandria and Fairfax Counties [Virginia] Civil War Correspondence, 1861/18621
- Alonzo D. Cushing Letters, 1861/18641
- Amon W. Updike Correspondence, 1861/18651
- Andrew Given Family Correspondence, 1859/18861
- Anna Lee Letter, 18611
- Baldwin Family Letters, 1861/18971