Names
- Port Huron and North Western Railway Company.1
- Protestant Reformed Churches of America.1
- Reid, Neil E., 1871-1
- Republican Party (Mich.)1
- Rio Grande Southern Railroad.1
- Roosevelt, Eleanor, 1884-1962.1
- Roosevelt, Franklin D. (Franklin Delano), 1882-1945.1
- Ruthven, Alexander Grant, 1882-1
- Ruthven, Alexander Grant, 1882-1971.1
- Saginaw Valley and St. Louis Railroad Company.1
- Saginaw, Tuscola and Huron Railroad Company.1
- Saldern Logging Company.1
- Seaman & Webster.1
- Sharpe, Edward M., 1887-1
- Shay, Ephraim, 1839-1916.1
- Sigler, Kim, b. 1894.1
- Smith, William Parkhurst, 1897-1
- Solvay Process Company.1
- Soo Line Railroad Company.1
- South Haven and Eastern Railroad Company.1