Collection
- Ice Skate Company Account Book2
- Inge Horton Architectural Collection5
- Institute for the History of Technology and Industrial Archaeology Records12
- International Association for Identification Records5
- Ira E. Robinson Papers1
- Ira F. Gensel Letter1
- Irvine-Saunders Family Papers 1745-1910 Inclusive14
- Isaac & Josiah Williams Brick Company, Account Books1
- Isaac B. Smith, Farmer and Music Teacher, Newspaper Clippings and Other Material1
- Isaac Campbell Account Book2
- Isaac Caruthers, Monroe County Merchant, Store and Tavern Ledgers1
- Isaac Cox Letter,2
- Isaac Horne Ledgers2
- Isaac L. Carey Correspondence, 1850s-18672
- Isaac M. Clark Letter1