Former Owner
- Sir William Henry Ingilby, 4th Bt.1
- Sir William Stirling-Maxwell, 9th Baronet1
- Sokol Books Ltd.1
- Sotheby's1
- Sotheby, Wilkinson & Hodge1
- St. Emmeram's Abbey1
- St. Matthias' Abbey1
- St. Maximin's Abbey1
- Stiftsbibliothek Kremsmünster1
- Sébastien de Rosmadec, marquis de Molac1
- T. Triphook1
- Tammaro De Marinis1
- Taschen von I. Kossel. R.1
- That Guy with the Books1
- Theodor Cramer-Klett1
- Theodore Parker1
- Thomas Bernardinus Braccioli1
- Thomas Blayds1
- Thomas E. Marston1
- Thomas Edwards1