University Library, University of Illinois at Urbana-Champaign

Chicago harbor & bar, Illinois. : from survey made in April, 1857, under the direction of Brevet Lieut. Col. J.D. Graham ... accompanying Lt. Col. Graham's annual report (No. 200) to the Chief Top Engineer, dated Chicago Sept. 30, 1857. Also his annual report (No. 230) to same, dated Chicago, November 15th, 1858
Chicago harbor and bar, Illinois

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Chicago harbor & bar, Illinois. : from survey made in April, 1857, under the direction of Brevet Lieut. Col. J.D. Graham ... accompanying Lt. Col. Graham's annual report (No. 200) to the Chief Top Engineer, dated Chicago Sept. 30, 1857. Also his annual report (No. 230) to same, dated Chicago, November 15th, 1858