Group of four maps of Lake Superior including one titled "The Upper Territories of the United States," one titled "North America, Sheet IV, Lake Superior," one titled "Map of the Mineral Lands Upon Lake Superior Ceded to the United States Government by the Treaty of 1812 with the Chippeway Indians," and one titled "Gray's Atlas Map of Lake Superior and the Northern Part of Michigan." Height ranges from 16 in to 24 1/4 in; width ranges from 19 5/8 in to 23 1/8 in.