Former Owner
- P. Desq1
- Paul Riant1
- Paul Viollet1
- Peter Le Neve1
- Petrus Giraud1
- Petrus Hofstede1
- Philadelphia Rare Books & Manuscripts Company1
- Philip III the Good1
- Philippe de Béthune1
- Pierre Picard le Jeune1
- Pius XI1
- Prieuré Saint-Louis de Poissy1
- Prince Augustus Frederick, Duke of Sussex1
- Québriac family1
- R. Stora and Company1
- Raoul Léonor Lignerolles1
- Ricardo, Conde de Benahavis Heredia1
- Richard Bennett1
- Richard Firth Green1
- Richard Graves1