Former Owner
- Paul Sabatier1
- Peter Ludwig1
- Pettini Libraria di Antonio Pettini1
- Pietro Antonio Maffei1
- Pietro Bembo1
- Pietro Civaleri1
- Prince Augustus Frederick, Duke of Sussex1
- Ramón de Mesonero Romanos1
- Raoul Chandon de Briailles1
- Reading Abbey1
- René Henry1
- Richard Nykke1
- Robert Branthwait1
- Robert Elyot1
- Rowland G. Hazard1
- Rudolph Frederick Kelker1
- Samuel Dennis1
- Samuel Frederick Houston1
- Santander San Juan, Simon de, -17911
- Seymour de Ricci1