![Original northern border of Illinois was south of Chicago and Lake Michigan | College of Agricultural, Consumer & Environmental Sciences :: University of Illinois Original northern border of Illinois was south of Chicago and Lake Michigan | College of Agricultural, Consumer & Environmental Sciences :: University of Illinois](https://aces.illinois.edu/sites/aces.illinois.edu/files/old_files/news/Waterways%2003%2040%25_1.jpg)
Original northern border of Illinois was south of Chicago and Lake Michigan | College of Agricultural, Consumer & Environmental Sciences :: University of Illinois
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File:1854 Colton Pocket Map of Ohio, Michigan, Wisconsin, Iowa, Illinois, Missouri, Indiana and Kentucky - Geographicus - WesternStates-colton-1854.jpg - Wikimedia Commons
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