During much of the time that Perrot was commandant of the West, several other great fur traders were conducting operations in Wisconsin. The greatest of these was the Chevalier La Salle, the famous explorer, who plays a large part on the stage of Western history, particularly in the history of the Mississippi valley. It has been claimed for La Salle that he was in Wisconsin in 1671, two years before Joliet, and actually canoed on the Mississippi River, but this is more than doubtful. We do know that in 1673 one of his agents was trading with the Sioux to the west of Lake Superior; and that in 1679 he came to Green Bay in a small vessel called the _Griffin_, the first sailing craft on the Great Lakes above the cataract of Niagara. La Salle was a _coureur de bois_, most of this time, for he operated in a field far larger than that for which he had a license. Leaving his ship, which was afterward wrecked, he and fourteen of his men proceeded in canoes southward along the western coast of Lake Michigan, visiting the sites of Milwaukee and other Wisconsin lakeshore cities. Finally, after many strange adventures, they ascended St. Joseph River, crossed over to the Kankakee River, and spent the winter in a log fort which they built on Peoria Lake, a broadening of the Illinois River. At least one priest was thought necessary in every well-equipped exploring expedition. La Salle had quarreled with the Jesuits, and hated them; hence the ministers of religion in his party were three Franciscan friars, one of them being Father Louis Hennepin, who afterward became famous. When La Salle determined to spend the winter at Peoria Lake, he sent Hennepin forward with two _coureurs de bois_, to explore the upper waters of the Mississippi. These three adventurers descended the Illinois River in their canoe, and then ascended the Mississippi to the Falls of St. Anthony, where now lies the great city of Minneapolis; there they met some Sioux, and went with them upon a buffalo hunt. But the Indians, although at first friendly, soon turned out to be a bad lot, for they robbed their guests, and practically held them as prisoners.