- Munroe, Elizabeth.1
- Museum of Fine Arts, Houston1
- Nelson, Horatio Nelson, Viscount, 1758-1805.1
- Newstead Abbey.1
- Northumberland, Hugh Percy, Duke of, 1712-17861
- O'Keeffe, Claudia, 1899-1984.1
- O'Keeffe, Georgia, 1887-19861
- O'Keeffe, Georgia, 1887-1986.1
- Old Faithful Inn (Wyo.)1
- Parker, Elma Ray Swain, 1894-1971.1
- Paterno, Charles, 1878-19461
- Pitt, George Morton, 1693-17561
- Pope, Alexander, 1688-17442
- Pratt family1
- Pratt, Clayton Watrous, 1880-1960.1
- Prime, David H., printer.1
- Provincetown Players1
- Radnor House (London, England)1
- Ranby, John, 1703-17732
- Rickard, Greville, 1889-1956.1
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