Former Owner
- Philip Sills1
- Phillip J. Pirages Fine Books & Manuscripts5
- Pierleone Leoni2
- Pierre Gorman1
- Pierre Gélis-Didot1
- Placida Mahl1
- Poblet Monastery1
- Preston A. Perry1
- Prieuré Saint-Louis de Poissy1
- Prince Augustus Frederick, Duke of Sussex1
- Prince Sadruddin Aga Khan2
- RR Donnelley1
- Rabbinical Seminary Vienna1
- Raffaello de’ Medici1
- Reiss & Son1
- Rev. T. Barnes1
- Richard Farmer1
- Richard Griffith1
- Richard Heber1
- Richard Hooker1