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- Parker, S. Adams (Samuel Adams), 1831-1896, author1
- Parsons, Usher, 1788-18681
- Parvin, Theophilus, 1829-18981
- Pasteur, Louis, 1822-18951
- Peters, John C. (John Charles), 1819-18931
- Plumer, John C.1
- Porter, Charles H. (Charles Hogeboom), 1834-19031
- Price, James W.1