Names
- Peerless Portland Cement Company.1
- Pennsylvania Railroad.1
- Pere Marquette Line Steamers.1
- Pere Marquette Railway.1
- Pontiac, Oxford and Northern Railroad Company.1
- Port Huron and North Western Railway Company.1
- Porter-Hicks Farm (Ann Arbor, Mich.)1
- Portland Cement Company (Alpena, Mich.)1
- Rio Grande Southern Railroad.1
- Saginaw Valley and St. Louis Railroad Company.1
- Saginaw, Tuscola and Huron Railroad Company.1
- Saldern Logging Company.1
- Schmidt, Carl Ernest, 1856-19341
- Schmidt, Carl Ernest, 1856-1934.1
- Seaman & Webster.1
- Shay, Ephraim, 1839-1916.1
- Solvay Process Company.1
- Soo Line Railroad Company.1
- South Haven and Eastern Railroad Company.1
- Southern Pacific Railroad Company.1