 In the entry Marquette mentions that they entered the mouth of the Illinois River early in the morning, which would mean that the party had camped somewhere below the mouth during the previous evening.The territory about Grafton is high and a desirable place to camp, while the land opposite, on the Missouri side is low and swampy and would have made an undesirable camping place.However, local historians in Calhoun County claim that the true stopping point of the expedition is a place now called "Perrin's Ledge", located several miles above Kampsville, IL.