Former Owner
- Peter Ludwig2
- Philip C. Duschnes2
- Philip Hofer2
- Philip Kerr, 11th Marquess of Lothian2
- Pierleone Leoni2
- Pierre Gélis-Didot2
- Pierre Pithou2
- Pietro Antonio Crevenna2
- Preston A. Perry2
- Prieuré Saint-Louis de Poissy2
- Ross Winans2
- Rudolf Busch2
- Rush Hawkins2
- Sam Fogg Rare Books & Manuscripts2
- Samuel Claggett Chew2
- Samuel Whitaker Pennypacker2
- San Sisto, Piacenza2
- Sandbergs Bokhandel2
- Seitenstetten Abbey2
- Silas W. Howland2