Chicago River – Part 1
Exploration
https://upload.wikimedia.org/wikipedia/commons/4/4e/Aquired_Lands_of_the_US.svg
https://www.museum.state.il.us/muslink/nat_amer/post/htmls/hi_explore.html
https://copper.org/education/history/timeline/timeline.html
https://www.nps.gov/parkhistory/online_books/chpo/chicago_portage.pdf
Population Growth
http://www.encyclopedia.chicagohistory.org/pages/962.html
https://www.pbs.org/wgbh/americanexperience/features/chicago-timeline/
http://www.encyclopedia.chicagohistory.org/pages/1753.html
http://www.encyclopedia.chicagohistory.org/pages/821.html
I&M Canal
http://www.encyclopedia.chicagohistory.org/pages/626.html
http://www.encyclopedia.chicagohistory.org/pages/1753.html
https://biotech.law.lsu.edu/cases/environment/ChicagoDiversionHistoryMarch5.pdf
https://www.ilsos.gov/departments/archives/teaching_packages/I_and_M_canal/home.html
https://iandmcanal.org/canalhistory/
Chicago Portage
https://oprfmuseum.org/continental-divide-online-exhibit
https://www.seekingmyroots.com/members/files/H001785.pdf
https://babel.hathitrust.org/cgi/pt?id=mdp.39015024232657&seq=23
Du Sable
https://www.britannica.com/biography/Jean-Baptist-Point-Du-Sable
http://www.encyclopedia.chicagohistory.org/pages/410078.html