.... After laboring among the Indians on the St. Lawrence several years, he penetrated the Western wilds and established a mission on the western shores of Lake Michigan, where he heard much about the Mississippi River , and made notes of what he learned concerning it. He explored Green Bay, and founded a mission among the Foxes, Miamis, and other tribes there. A mission begun by Marquette at Kaskaskia, Ill., Allo...