Relief shown by hachures. Prime meridian: London. "Entered according to Act of Congress in the year 1855, by J.H. Colton & Co. ..." "Grid in miles from the General Post Office." "No. 4." 1 map; 29 x 36 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.