Former Owner
- Philippe de Béthune1
- Phillip J. Pirages Fine Books & Manuscripts1
- Phyllis Walter Goodhart Gordan1
- Pierleone Leoni1
- Pierre Gélis-Didot1
- Pierre Pithou1
- Pierre Tassel1
- Pierre de La Vacherie1
- Pietro Antonio Crevenna2
- Pontigny Abbey2
- Prieuré Saint-Louis de Poissy1
- Prince Augustus Frederick, Duke of Sussex3
- Prosper Blanchemain1
- Quinton Edward Gurney1
- Québriac family1
- R. A. Godwin-Austen1
- R. Stora and Company2
- Raymond Berriot1
- Raymond Oliver1
- René Antoine Thoué1