Former Owner
- Sir Philip Sydenham, 3rd Baronet1
- Sir Thomas Brooke, 1st Baronet2
- Solomon Joachim Halberstam1
- Sotheby's1
- Stefano Scarella1
- Stephen Butler Rare Books & Manuscripts2
- Stephen Penny1
- Susan B. Minns1
- Sydney Cockerell16
- Tammaro De Marinis1
- That Guy with the Books1
- Thomas Bernardinus Braccioli1
- Thomas Blayds1
- Thomas E. Marston1
- Thomas Edwards1
- Thomas Eyre1
- Thomas F. Richardson7
- Thomas FitzRoy Phillipps Fenwick1
- Thomas Gage1
- Thomas Herbert, 8th Earl of Pembroke1