...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., Allouez sought to make his permanent field of labor; but when La Salle, the bitter opponent of the Jesuits, approached in 1...