Former Owner
- John B. Stetson Jr.2
- John Eliot Hodgkin2
- John Harvey Treat2
- John Ruskin2
- Joseph Pope2
- Joseph-Félix Allard2
- Justin MacCarthy Reagh2
- Kenneth J. "Bud" Jennings2
- Laurence Claiborne Witten II2
- Leo Olschki2
- Leonardo Lapiccirella2
- Leonello d'Este, Marquis of Ferrara2
- Libreria la Bibliofila2
- Louis César de La Baume Le Blanc2
- Ludwig Rosenthal's Antiquariaat2
- Marie-François Duchesne de Beaumanoir2
- Martin Schøyen2
- Mary Lacaita2
- Michele Cavaleri2
- Morris H. Morgan2