- 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
- Pratt family1
- Pratt, Clayton Watrous, 1880-1960.1
- Prime, David H., printer.1
- Provincetown Players1
- Radnor House (London, England)1
- Rickard, Greville, 1889-1956.1
- Rivers, George Pitt, Baron, 1721-18031
- Robinson, Edwin Meade, 1878-1946.1
- Robinson, Martha Coon.1
- Sangorski & Sutcliffe.1
- Sévigné, Marie de Rabutin-Chantal, marquise de, 1626-16961
- Sheridan, Richard Brinsley, 1751-18161
- Smith, Hyrum, 1800-18441
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