Former Owner
- Robert Hoe III1
- Robert Lyle1
- Rudolf Busch1
- Rush Hawkins1
- Saint-Amand Abbey1
- Saluti, Tomasso, active 20th century1
- Samuel H. Putnam1
- San Barnaba Church1
- Sonnyng, John1
- Sonnyng, William1
- Stephen Butler Rare Books & Manuscripts2
- Sydney Cockerell30
- That Guy with the Books1
- Theodore Parker1
- Thomas FitzRoy Phillipps Fenwick1
- Thomas Gage1
- Thomas Gibson-Carmichael, 1st Baron Carmichael1
- Thomas Phillipps8
- Thomas Tenison1
- Thomas Thorpe2