Former Owner
- San Francesco1
- San Sisto, Piacenza2
- Sandbergs Bokhandel2
- Sarah Dauphinais1
- Sigmund Ortel1
- Sion Segre Amar1
- Sokol Books Ltd.1
- Sonnyng, John1
- Sonnyng, William1
- St. Mary's College1
- Stephen Butler Rare Books & Manuscripts1
- Sydney Cockerell15
- Sydney Edward Lucas2
- Taschen von I. Kossel. R.1
- Theodore Parker1
- Thomas Eyre1
- Thomas Mildmay1
- Thomas Phillipps6
- Thomas Rodd1
- Thomas Wall1