Former Owner
- Paul Gottschalk2
- Paul Sabatier2
- Peter Arrell Brown Widener2
- Peter Arrell Brown Widener II2
- Peter Le Neve2
- Philip Hofer2
- Philip Kerr, 11th Marquess of Lothian2
- Pierleone Leoni2
- Pierre Gélis-Didot2
- Pierre Pithou2
- Pietro Antonio Crevenna2
- Prieuré Saint-Louis de Poissy2
- Richard Linenthal2
- Robert Brodhead Honeyman2
- Ross Winans2
- Rudolf Busch2
- Rush Hawkins2
- Sam Fogg Rare Books & Manuscripts2
- Samuel Allen2
- Samuel Claggett Chew2