Former Owner
- Peter Le Neve1
- Petrus Hofstede1
- Philadelphia Rare Books & Manuscripts Company1
- Philip Hofer1
- Philip van Alfen1
- Phillip J. Pirages Fine Books & Manuscripts1
- Québriac family1
- Rudolf Busch1
- Rush Hawkins1
- Saluti, Tomasso, active 20th century1
- Sandbergs Bokhandel1
- Stephen Butler Rare Books & Manuscripts1
- Sydney Cockerell1
- That Guy with the Books1
- Thomas Gage1
- Vittorio Forti1
- William Augustus White1
- William Bragge1
- William H. Schab1
- William Horatio Crawford1