Former Owner
- Samuel Whitaker Pennypacker1
- Sandbergs Bokhandel1
- Sather, Eugene E. (Eugene Earl), 1924-19861
- Sebastienne Boscher1
- Sir Godfrey Webster1
- Sir Henry St John-Mildmay, 4th Baronet1
- Sir John Peachey1
- St. Mary's College1
- Stephen Butler Rare Books & Manuscripts1
- Stuart Rose1
- Susan Minns1
- Swann Galleries1
- T. Royer1
- T. Whitcombe Greene1
- That Guy with the Books1
- Theodore Newton Vail1
- Theodore Williams1
- Thomas Gage1
- Thomas Mildmay1
- Thomas Phillipps1