Former Owner
- Rudolf Busch1
- Rudolph Frederick Kelker1
- Rushton Mather Dorman2
- Ruth E. Adomeit1
- Ruth Fowler Jarvis2
- S. Ereilter1
- Sabin1
- Saint-Amand Abbey1
- Sam Fogg Rare Books & Manuscripts1
- Samuel Claggett Chew2
- Samuel Dennis1
- Samuel Putnam Avery2
- Sather, Eugene E. (Eugene Earl), 1924-19861
- Scott Gwara1
- Sebastienne Boscher1
- Sigurd Wandel2
- Simon Gratz1
- Simon Jason Schwartz1
- Sir John Peachey1
- Sir John Thorold, 10th Baronet1