Names
- O'Hara, John J., 1885-1
- Olds, Ransom Eli, 1864-1950.1
- Osborn, Chase S. (Chase Salmon), 1860-1
- Osborn, Chase S. (Chase Salmon), b. 1860.1
- Perkins, Frances, 1880-1965.1
- Person, Seymour Howe, 1879-1957.1
- Piggins, Edward S.1
- Piggins, Edward S., -1972.1
- Pinchot, Gifford, 1865-1946.1
- Pingree, Hazen S., 1840-1901.1
- Plunkett, Horace Curzon, Sir, 1854-1932.1
- Pollock, James K. (James Kerr), 1898-1968.1
- Pollock, James Kerr, 1898-1968.1
- Potter, William W., 1869-1940.1
- Rackham, Horace H., 1858-1933.1
- Rackham, Mary A. Horton, -1947.1
- Read, Thomas, 1881-1
- Reichert, Rudolph Edward, 1887-19651
- Reichert, Rudolph Edward, 1887-1965.1
- Reid, Clarence A.1