All public lands of the United States situated north of township 60 north in the Counties of Cook and Lake, State of Minnesota, including the natural shore lines of Lake Superior within such area; all public lands of the United States situated in that part of St. Louis County, State of Minnesota, lying north of a line beginning at the northeast corner of Township 63 north, Range 12 west, 4th P. M., thence westerly along the township line to the southwest corner of Township 64 north, Range 18 west, 4th P. M., thence northerly to the northwest corner of Township 65 north, Range 18 west, 4th P. M., thence westerly to the southwest corner, Township 66 north, Range 21 west, 4th P. M., thence northerly along the Township line to its intersection with the int