Prime meridian: Washington. Engraved by: E.B. Dawson. From: Tanner's universal atlas, no. 25. Below border at left: "Entered according to act of Congress, in the year 1841, by H.S. Tanner, in the clerks office of the Eastern District of Pennsylvania." Inset map: Western Part of Michigan. Includes table of steam boat routes. Shows county divisions. 1 map : col. ; 33 x 27 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.