- "Jennie" letter, 18641
- 1st New York Mounted Rifles letter, 18641
- Andrew Knox Letter, 18621
- Anson Du Puy Van Buren letters, 1863/19971
- Archibald A. Livingston letter, 18651
- Asa Moore Janney Forest Mills ledgers, 1861/18751
- Biddle Boggs and Mrs. B Miller correspondence, 18621
- Camp Upton, Virginia letter, 18611
- Catherine Powell letter, 18611
- Celia Humm letter to Joseph Paxson, 18631
- Charles Minnigerod mammoth plate portrait, 1865/18791
- Civil War stereoviews, 18651
- Cordie Meanley Diaries, 1862/18711
- Corr-Hogge family papers, 1847/19961
- Cortland Way Starr letters, 18631