- A.M. Scott Correspondence, 1874/18821
- Bradford Noyes (b.1860) Typed Document, 19481
- Emory L. Kemp Papers regarding Industrial History, 1735/20211
- Felix G. Hansford Papers, 1790/18621
- Felix G. Hansford Papers, 1790/18751
- Felix G. Hansford Papers, 1796/18761
- J.Q. Dickinson and Company, Papers and Photographs, 1887/19571
- John Ewing, Soldier, Civil War Letter, 18621
- Martin Browne, Copy Books of a Putnam County Resident, 1805/1833, bulk 1810/18331
- Steamboats Records, 1877/19391
- Union Carbide Corporation, Hawk's Nest Project, Papers, 1873/19661
- William Starke Rosecrans (1818-1898) Correspondence, 1841/18791