Names
- Paddock, Alfred J.1
- Paris & Pere Marquette River Railroad Company.1
- Peerless Portland Cement Company.1
- Pennsylvania Railroad.1
- Pere Marquette Line Steamers.1
- Pere Marquette Railway.1
- Piper, William J.1
- Pomeroy, Austin.1
- Pond, Irving K. (Irving Kane), 1857-1939.1
- Pond, Irving Kane, 1857-1939.1
- Pontiac, Oxford and Northern Railroad Company.1
- Port Huron and North Western Railway Company.1
- Pritchett, Henry Smith, 1857-1939.1
- Republican Party (Mich.)1
- Rindge, Warren.1
- Rio Grande Southern Railroad.1
- Robinson, John Beverley, 1853-1
- Robinson, John Beverly, 1853-1923.1
- Ross, Denman Waldo, 1853-1935.1
- Saarinen Eliel, 1873-1950.1