Chicago harbor & bar, Illinois from survey made between the 17th of August & the 2nd of September 1858 under the direction of Brevet Lieut. Col. J.D. Graham, Major U.S. Top. Engineers. Superintending Engineer of Lake Harbor Works.
The soundings are in feet & tenths of a foot."; "Accompanying Lt. Colonel J.D. Graham's annual report (no. 161) to Chief Topograpical Engineer, dated November 15th 1856."; Includes text.; "Map G. No. 58."; 1 map 80 x 103 c
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