Former Owner
- Josephine Widener Wichfield1
- José Antonio Conde1
- Kloster Rebdorf1
- Lane Theological Seminary1
- Lathrop C. Harper, Inc.1
- Leicester Harmsworth1
- Louis Lucien Bonaparte1
- Luigi Celotti1
- Léon Gruel1
- M. Pierre Guarin1
- Mannheimer Hofbibliothek1
- Mary Bloch1
- Mary Lacaita1
- Mary Stanley, Countess of Derby1
- Mary W. T. Dickinson1
- Michael Greenberg1
- Mikhail Golitsyn1
- Mirmellus Arnandi1
- Monasterio de El Paular1
- Mrs. Turnbull1