The Last Vestige of Fort Dearborn Small 320×204 Medium 640×408 Large 1024×653 Download Tiff Original 2400×1530 | (5.8 MB) Description Fort Dearborn, named in honor of Henry Dearborn, was a United States fort built on the Chicago River in 1803 by troops under Captain John Whistler. Keywords American fort, chicago, last vestige, remains Galleries Illinois Source: Benson John Lossing, ed. Harper's Encyclopedia of United States History (vol. 2) (New York, NY: Harper and Brothers, 1912)