Graham, J. D. (James Duncan), 1799-1865United States. Army. Corps of Topographical EngineersThe soundings are in feet & tenths of a foot. Includes sailings directions and description of the buildings at old Fort Dearborn. "Map G. No. 38." 1 map; 58 x 77 cmJPEG989c718f-f085-48bd-8fcb-ea94c3e520aeengPublicChicago harbor & bar, Illinois from survey made between March 29th & April 9th 1856 under the direction of Brevet Lieut. Col. J.D. Graham, Major U.S. Top. Engineers. Superintending Engineer of Lake Michigan Works.MapsIllinois--ChicagoIllinoisapproximately 1856University of Michigan