From the facility with which the French gained the good will and friendly alliance of the Natives in Canada, by intermarrying with, and assimilating themselves to the habits and inclinations of, these children of the forest, an intimacy arose which induced the Indians to impart freely to the French their knowledge of the interior country. Among other things information was communicated to them, of the fact that farther on there was a river of great size and immense length, which pursued a course opposite to that of the St. Lawrence, and emptied itself into an unknown sea. It was conjectured that it must necessarily flow either into the Gulph of Mexico, or the South Sea; and in 1673 Marquette and Joliet, French missionaries, together with five other men, commenced a journey [7] from Quebec to ascertain the fact and examine the country bordering its shores.
From lake Michigan they proceeded up the Fox river nearly to its source; thence to Ouisconsin; down it to the Mississippi, in which river they sailed as far as to about the thirty-third degree of north latitude. From this point they returned through the Illinois country to Canada.
At the period of this discovery M. de La Salle, a Frenchman of enterprise, courage and talents but without fortune, was commandant of fort Frontignac. Pleased with the description given by Marquette and Joliet, of the country which they had visited, he formed the determination of examining it himself, and for this purpose left Canada in the close of the summer of 1679, in company with father Louis Hennepin and some others.[3] On the Illinois he erected fort Crevecoeur, where he remained during the winter, and instructing father Hennepin, in his absence to ascend the Mississippi to its sources, returned to Canada. M. de La Salle subsequently visited this country, and establishing the villages of Cahokia and Kaskaskia, left them under the command of M. de Tonti, and going back to Canada, proceeded from thence to France to procure the co-operation of the Ministry in effecting a settlement of the valley of the Mississippi. He succeeded in impressing on the minds of the French Ministry, the great benefits which would result from its colonization, and was the first to suggest the propriety of connecting the settlements on the Mississippi with those in Canada by a cordon of forts; a measure which was subsequently attempted to be carried into effect.