The new impulse which had been given to Canada by Colbert and Talon began to bear fruit. Commerce revived, immigration increased, and the aborigines, dominated by the genius of civilization, feared and respected everywhere the power of France. Perrot, a famous explorer, was the first European who reached the end of Lake Michigan and the Miamis country, where deputies from all the native tribes of the regions irrigated by the head waters of the Mississippi, the sources of the Red River and the St. Lawrence, responded to his call to meet him at the Sault Ste. Marie, From one discovery to another, as so many successive stages in a journey, the French attained a certainty that "the Great Water" did exist, and they could, in advance, trace its probable course. It appeared certain, from the recent search made for it in northerly and eastern directions, that its waters, so voluminous as the natives asserted, must at last find their sea-vent either in the Bay of Mexico or in the Pacific Ocean. Talon, who took a strong interest in the subject, during his intendancy recommended Captain Poulet, a skilful mariner of Dieppe, to verify the passage from sea to sea, through the Straits of Magellan. He induced M. de Frontenac to send M. Joliet into the region where the great stream, yet unseen, must take its rise; and follow its course, if found, till its waters reached the sea. The person thus employed on a mission which interested everyone at the time was a man of talent, educated in the Jesuits' College of Quebec, probably in view of entering the Church, but who had gone into the peltry trade. He had travelled much in the countries around Lake Superior and gained great experience of the natives, especially those of the Ottawa tribes. M. Joliet and Pere Marquette set out together in the year 1673. The latter, who had lived among the Potowatami Indians as a missionary, and gained their affections, was forewarned by them of the perils, they alleged, which would beset his steps in so daring an enterprise, admonishing him and his companion that the people of the farther countries would allow no stranger to pass through them; that travellers were always pillaged at the least; that the great river swarmed with monsters who devoured men,[1] and that the climate was so hot that human flesh could not endure it. [Footnote 1: There was some foundation for this report, as alligators abounded, at that time, in the lower waters of the river.]