1911. 2021-09-17T18:05:46Z. 2021-09-18T03:01:38Z. Marshall, R. B. (Robert Bradford), 1867-1949, cartographer. U.S. Geological Survey. English. cartographic image. Public. Calumet Region (Mich.), Keweenaw County (Mich.), Houghton County (Mich.), Michigan, Calumet Region., Houghton County., and Keweenaw County.