Former Owner
- Marie Ange-Toussaint Placide de Ferron1
- Marion Lawrence1
- Martinus Nijhoff1
- Middle Hill Rare Books & Manuscripts AB (Stockholm, Sweden)1
- Milt Freudenheim1
- Minnis, Katherine1
- Monsieur de Bel Air1
- Morot1
- N. Pauli1
- Nicholas B. Scheetz1
- Parroco di Taviano, Luigi Bruno, active 20th century1
- Paul Gottschalk1
- Peter Arrell Brown Widener1
- Peter Arrell Brown Widener II1
- Petrus Hofstede1
- Petrus Jensenius1
- Petrus Ysermans1
- Philadelphia Rare Books & Manuscripts Company1
- Philip Hofer1
- Philip van Alfen1