Collection
- Ignorance Club collection, 1908/20243
- Industrial Workers of the World Records, 19192
- Interior and exterior photographs of Lee House, 1869/18702
- International Order of Odd Fellows, Stonewall Lodge No. 136 Records, 18682
- Invitation to the 196th Anniversary of George Washington's Gift to Liberty Hall Academy, 19922
- Ironmasters, 1930/19563
- Irwin Taylor Sanders Papers, 1925/19502
- Isaac Bird correspondence, 1824/18342
- Isaac Newton Campbell Notebook, 1874/18762