Former Owner
- Philip C. Duschnes2
- Pierleone Leoni2
- Pierre Gélis-Didot2
- Pierre Pithou2
- Preston A. Perry2
- Prieuré Saint-Louis de Poissy2
- Quinton Edward Gurney2
- R. Stora and Company2
- Richard Gough2
- Richard Linenthal2
- Robert Mignan2
- Ross Winans2
- Rudolf Busch2
- Rush Hawkins2
- Sam Fogg Rare Books & Manuscripts2
- Samuel Claggett Chew2
- Samuel Whitaker Pennypacker2
- San Giorgio Monastery2
- San Sisto, Piacenza2
- Sandbergs Bokhandel2