Former Owner
- Phillip J. Pirages Fine Books & Manuscripts1
- Pierre Pithou1
- Pontigny Abbey1
- Reading Abbey7
- Robert Garrett1
- Rosamond B. Loring1
- Rowland Oseley1
- Rudolph Frederick Kelker1
- Scott Gwara1
- Sigurd Wandel2
- Sister Anna van Essen1
- Sister Marghareta van den Spegher1
- Sydney Cockerell9
- T. Fownes7
- Thomas Phillipps21
- Weissenau Abbey1
- Wilfrid Voynich1
- William Bragge2
- William F. Fratcher1
- William Morris1