Former Owner
- Theodore Newton Vail1
- Theodore Williams1
- Theodorico de Buckinstorff1
- Thomas Barber1
- Thomas Bateman1
- Thomas Boult1
- Thomas Dackomb1
- Thomas F. Richardson15
- Thomas FitzRoy Phillipps Fenwick1
- Thomas Gardner1
- Thomas Grenville1
- Thomas H. Moynan1
- Thomas Phillipps22
- Thomas Richardson2
- Thomas Shadford Walker1
- Thomas Thorpe2
- Timothy Manlove1
- Turner Macan1
- University of Chicago Library1
- W. J. Gilbert6