Former Owner
- Justin MacCarthy Reagh1
- Latham family1
- Laurence Kirby1
- Long Island Historical Society, Maine1
- Louis XIV of France1
- Manuel John Johnson1
- Margaret F. Woodward1
- Margaret of Croy1
- Marguerite de Fontenay1
- Marie Ange-Toussaint Placide de Ferron1
- Martinus Nijhoff1
- Mary Schell Collins1
- Mary, Queen of Scots1
- Merlemont family1
- Middle Hill Rare Books & Manuscripts AB (Stockholm, Sweden)1
- Minnis, Katherine1
- Monsieur de Bel Air1
- N. Pauli1
- Nettie Goldsmith Naumburg1
- Nicholas B. Scheetz1