Graham, J. D. (James Duncan), 1799-1865United States. Army. Corps of Topographical EngineersThe soundings are in feet & tenths of a foot. "Accompanying Lt. Colonel J.D. Graham's annual report (no. 200) to Chief Top. Engineer, dated September 20th 1857." Includes text (4 notes) and "Note 5" pasted on. "Map G. No. 52." Portions near left and right margins missing from MiU copy. 1 map; 80 x 125 cmJPEGcf0aad24-c644-4334-bbfa-e8797a35438dengPublicChicago harbor & bar, Illinois from survey made in April 1857 under the direction of Brevet Lieut. Col. J.D. Graham, Major U.S. Top. Engineers. Superintending Engineer of Lake Harbor Works.MapsIllinois--ChicagoIllinois1857University of Michigan