Former Owner
- New York Academy of Medicine3
- Newman F. McGirr1
- Nicholas Bacon1
- Otto Ege14
- Otto Orren Fisher1
- Parke-Bernet1
- Perceval Lucas1
- Peter Le Neve2
- Peterborough Central Library1
- Philip Carteret Webb1
- Philip Kerr, 11th Marquess of Lothian1
- Philip Milburn1
- Phillip J. Pirages Fine Books & Manuscripts1
- Phyllis Walter Goodhart Gordan1
- Prince Augustus Frederick, Duke of Sussex2
- Quinton Edward Gurney2
- Ralph Ewart Ford1
- Ralph Thoresby1
- Ralph Verney, 1st Earl Verney1
- Reginald Cholmondeley1