Former Owner
- Thomas Gardner1
- Thomas Grenville1
- Thomas H. Moynan1
- Thomas Holmes1
- Thomas Oliver Anderdon1
- Thomas Phillipps26
- Thomas Richardson2
- Thomas Shadford Walker1
- Thomas Thorpe2
- Timothy Manlove1
- Turner Macan1
- University of Chicago Library1
- Victor Christ2
- W. J. Gilbert6
- Walter Ashburner1
- Walter Raglan Hubbard1
- Walter Sneyd1
- Warren C. Crane4
- Wilfrid Voynich2
- William Bragge4