The natives with him also perished, but he struggled to shore with difficulty, and went on his way to Quebec to report his wonderful discoveries to the Governor, Frontenac.

Fortunately Father Marquette had also kept a journal and had made maps, and these reaching the superior of his mission arrived in time to confirm Jolliet's statements.
Jolliet married at Quebec, and proceeded to explore and develop the regions along the north coast of the Gulf of St.Lawrence, travelling in this work as far as Hudson's Bay.

He was given by the French Government the Island of Anticosti as a reward for his achievements, but the work and capital which he put into the development of this long-neglected island came to nothing; for it was captured by the English, and Jolliet died a poor man whilst attempting to explore the coast of Labrador.
As to ROBERT CAVALIER DE LA SALLE, he had, after all, discovered the Ohio, and had descended that river as far as the site of the present town of Louisville.

Then he interested the Governor (Frontenac) of Canada in his enterprises.

A fort, called Fort Frontenac, was built at what is now Kingston, at the point where the St.Lawrence leaves Lake Ontario.