United States. Army. Corps of EngineersProjected from a trigonometrical survey executed under the orders of Major C.B. Comstock ... in 1871, 1872 & 1873.; "Survey of the northern and northwestern lakes."71 x 124 centimeters or smallerJPEGUMN_ALMA:9935022190001701engHeadquarters of the Corps of Engineers (Washington)PublicSt. Lawrence RiverMaps1876University of Minnesota