Relief shown by hachures and spot heights.; Shows Minnesota counties as of 1873, cities and towns, railroads, and natural features.; At base of map: "Entered according to Act of Congress in the year 1877 by S. Augustus Mitchell in the Office of the Librarian of Congress at Washington."; In upper right corner: 81.; Probably detached from an atlas in which the map occupies plate no. 81.; Prime meridians: Greenwich and Washington, D.C. 32 x 28 centimeters Scale approximately 1:2,100,000 General Minnesota Maps