Inset map: Plat of the copper district on Lake Superior. Indicates cities and towns. Shows surveyed counties. "Entered according to Act of Congress in the clerks office of District Court of the United States for the District of Michigan at Detroit on the 11th day of March 1844 by John Farmer of Detroit. Entered according to Act of Congress as a foresaid on the 6th day of March A.D. 1849. "Reentered according to Act of Congress in the clerks office of the District Court of the United States for the District of Michigan at Detroit this 29th day of Sept. A.D. 1838 by John Farmer of said district as Author author & proprietor." Engraved by John Farmer". 1 map: col.; 81 x 54 cm.