Keywords: Illinois 1718.jpg Illinois in 1718 approximate modern state area highlighted from Carte de la Louisiane et du cours du Mississipi by Guillaume de L'Isle Library of Congress Public Domain Site http //hdl loc gov/loc gmd/g3700 ct000666 1718 rev 2009 Creator Guillaume Delisle US Govt Public Domain also author +100 years PD-old-100 original upload log page en wikipedia Illinois_1718 jpg 2009-07-25 15 17 Billwhittaker 589×737× 237103 bytes <nowiki> Illinois in 1718 approximate modern state area highlighted from Carte de la Louisiane et du cours du Mississipi by Guillaume de L'Isle Library of Congress Public Domain Site http //hdl loc go</nowiki> Illinois River Guillaume Delisle Old maps of Illinois Old maps of New France |