Former Owner
- Norman H. Strouse1
- Otto Ege1
- Otto Orren Fisher1
- P. Pigeot1
- Paul Louis Feiss1
- Peter Le Neve1
- Petrus Hofstede1
- Philadelphia Rare Books & Manuscripts Company1
- Philip Hofer1
- Philip Kerr, 11th Marquess of Lothian1
- Philip van Alfen1
- Philippe de Béthune1
- Phillip J. Pirages Fine Books & Manuscripts1
- Pius XI1
- Québriac family1
- R. A. Godwin-Austen1
- Raoul Léonor Lignerolles1
- Rev. Frederick Collins Wilson1
- Ricardo, Conde de Benahavis Heredia1
- Richard Blount1