Former Owner
- Nicolas Rauch1
- Notre-Dame de Macourt monastery1
- Otto Haas1
- Otto Orren Fisher1
- P. Pigeot1
- Paolo Vimercati Sozzi1
- Paul Joseph Sachs1
- Paul Louis Feiss1
- Paul Sabatier1
- Pedro García de Montoya1
- Peter Le Neve1
- Petrus Giraud1
- Petrus Hofman Peerlkamp1
- Petrus Hofstede1
- Petrus Molitor1
- Philadelphia Rare Books & Manuscripts Company1
- Philip C. Duschnes1
- Philip C. Duschnes Rare Books & First Editions1
- Philip Kerr, 11th Marquess of Lothian1
- Philip van Alfen1