Shows the Au Sable River, lakes, railroad lines, railroad stops, roads, and camping sites. Traced by E.F. Ayde, revised by R.E. Andrews. Robert E. Andrews, Water Office Detroit, Mich. Negative blueprint copy. 1 map; 57 x 72 cm This map is in the public domain. Please attribute access and use of this digitized map to the Stephen S. Clark Library, University of Michigan Library.