Former Owner
- Ricardo, Conde de Benahavis Heredia1
- Richard Bennett1
- Robert H. Sayre1
- Robson & Kerslake1
- Ross R. DeVean1
- Ross Winans1
- Roy G. Fitzgerald1
- Royaumont Abbey1
- Rudolf Busch1
- Rudolph Frederick Kelker1
- Rushton Mather Dorman1
- Ruth E. Adomeit1
- S. Ereilter1
- Sabin1
- Saint-Amand Abbey1
- Sam Fogg Rare Books & Manuscripts1
- Samuel Dennis1
- Sather, Eugene E. (Eugene Earl), 1924-19861
- Scott Gwara1
- Sebastienne Boscher1