Former Owner
- Mannheimer Hofbibliothek1
- Margaret Anna Hazard1
- Martin Schøyen1
- Mary Bloch1
- Mayfair Rare Books and Manuscripts1
- Michael Greenberg1
- Michael Tomkinson1
- Monastery of Saint Peter (Erfurt, Germany)1
- Morton Davis Mitchell1
- Mrs. Turnbull1
- Nancy McGrath1
- Nathan Comfort Starr1
- Nell Wheeler1
- New York Academy of Medicine1
- Nicholas Chevalier1
- Nicholas Herry1
- Notre-Dame de Macourt monastery1
- O. A. Bump1
- Oliver Henry Perkins1
- Oliver R. Barrett1