Unfortunately for researchers, there's a whole school of paleo-Indian archaeology out there who really don't want anybody finding Chinese stuff down there, but that's exactly what they are going to find because, as serious students know, when DeSoto came to Angel Mounds and then Cahokia, the resident Indians in that area were the Sioux and their brethren. These Indians used a sign language which uses the human body to form characters identical to those found in the remains of the Shang state in China.
See my post at #8 on http://www.freerepublic.com/focus/fr/632079/ posts for my last most recent reference to this.
Oh, yes, you can start reading all about DeSoto at http://www.floridahistory.com/kentucky.html
And those characters - a brief is located at http://flora.huh.harvard.edu/china/focnews/August-97/0023.html