Former Owner
- Robert Neville1
- Robert Ranshaw1
- Robert Wheeler Willson1
- Rolls1
- Rosamond B. Loring1
- Rowland G. Hazard1
- Rowland Oseley1
- Rudolf Busch1
- Rush Hawkins1
- S. Ereilter1
- Saint Mihiel Abbey1
- Saint-Amand Abbey1
- Saint-Riquier1
- Saluti, Tomasso, active 20th century1
- Sam Fogg Rare Books & Manuscripts1
- Samuel Eliot1
- Samuel Petit1
- Samuell Bouter1
- San Barnaba Church1
- San Cristoforo alla Certosa (Church : Ferrara, Italy)1