Graham, J. D. (James Duncan), 1799-1865Mayer, J. R. (John R.)United States. Army. Corps of Topographical EngineersNorth oriented toward right. "Soundings are in feet and tenths of a foot." "The figures on land express the elevations above the lake surface in feet and decimals. The horizontal curves or contour lines are drawn at intervals of 5 feet of perpendicular elevation." "Accompanying Lt. Colonel Graham's annual report (no. 200) to the Chief Top. Engineer, dated Chicago September 30th 1857." "Map G. No. 51." 1 map; 60 x 91 cmJPEGe933965f-ccc9-48ff-a063-30c32ae928aaengPublicMouth of Kalamazoo River, Michigan from survey made between the 2d & 10th September 1856 by assistant John R. Mayer, under the direction of Brevet Lieut. Col. J.D. Graham, Major, U.S. Top. Engineers. Superintending Engineer of Lake Michigan Works.MapsMichigan--Kalamazoo RiverMichigan1856University of Michigan