Former Owner
- Lathrop C. Harper, Inc.1
- Laurentius van der Torqel1
- Libreria antiquaria Mediolanum1
- Libreria la Bibliofila1
- Louis César de La Baume Le Blanc1
- Louis II, Count of Flanders1
- Lucien Magne1
- Ludwig Rosenthal's Antiquariaat1
- Léon Gruel1
- Marcela Gabriela1
- Margaret F. Woodward1
- Marguerite de Fontenay1
- Marie Ange-Toussaint Placide de Ferron1
- Marie Cleophe de Sollario1
- Marie de Albano1
- Mariota Lyle1
- Martinus Nijhoff1
- Maurice Kann1
- Middle Hill Rare Books & Manuscripts AB (Stockholm, Sweden)1
- Minerva Kaiser1