ploration. A little later he pro- LA SALLE.
'cured a grant of Fort Frontenac,
and from it made long trips to the west. He visited the Ohio valley, and some even claim for him the discovery of the Mississippi. He and his lieutenant Tonty many times crossed and recrossed the low divide which, at the south end of Lake Michigan, separates the two largest water systems of North America—that of the St. Lawrence from that of the Mississippi. The first vessel to ply on Lake Erie, the Griffon, was built on the banks of the Niagara River by La Salle iii 1679. It was, unfortunately, lost on Lake Michigan in that same year. La Salle and Tonty also built forts on the banks of the Illinois River, and, in spite of every difficulty, opened up trade with the Indians of the Illinois valley.
Frontenac Recalled.—Frontenac's troubles during his first term (1672–1682) arose largely from his quarrels with Laval as to the bishop's position in affairs of state. Duchesneau, the intendant, who had his own causes of complaint against Frontenac; sided with the bishop. The disputes were long and bitter, and