Former Owner
- Alfonso Cassuto1
- Alfredo Chavero1
- Ambroise Firmin Didot1
- Andrea della Valle1
- Anne of Brittany1
- Antiquarian Books of Boston1
- Arnold Mettler1
- Arthur Brölemann1
- Athelstan Riley1
- Bartholus Blancellus1
- Bertram Ashburnham, 4th Earl of Ashburnham1
- Brayton C. Ives1
- Caxton Club1
- Chapelle du monastère du Carmel de Nantes1
- Charles Kothen1
- Charles-Gilbert Morel de Vindé1
- Chartreuse Saint-Sixte de Rettel1
- Christian Gottlieb Schwarz1
- Christophorus de Stinglhaim1
- Clarence S. Bement1