Former Owner
- Payre-Grolée-Virville family1
- Penzance Library1
- Percy Mordaunt Barnard1
- Petrus Giraud1
- Petrus Hofman Peerlkamp1
- Philip C. Duschnes2
- Philip Hofer1
- Philip Robinson1
- 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 Sussex2
- Prince Sadruddin Aga Khan2
- RR Donnelley1