The chiefs responded with the gift of a rush mat for Marquette and Jolliet to rest on during their journey, and sent two young Miamis with them. If these kindly Indians disliked to set the expedition further on its way, they said nothing but very polite things about the hardihood of Frenchmen, who could venture with only two canoes, and seven in their party, on unknown worlds.

The young Miamis, in a boat of their own, led out the procession the tenth morning of June. Taking up paddles, the voyageurs looked back at an assembled multitude—perhaps the last kindly natives on their perilous way—and at the knoll in the midst of prairies where hospitable rush houses stood and would stand until the inmates took them down and rolled them up to carry to hunting grounds, and at groves dotting those pleasant prairies where guests were abundantly fed.

Three leagues up the marshy and oats-choked Fox River, constantly widening to little lakes and receding to a throat of a channel, brought the explorers to the portage, or carrying place. The canoes then had to be unloaded, and both cargo and boats carried overland to a bend of the Miscousing, which was the Indian name for Wisconsin River. "This portage," says a traveler who afterwards followed that way, "is half a league in length, and half of that is a kind of marsh full of mud." In wet seasons the head of Fox River at that time seemed not unlikely to find the Wisconsin, for Marquette has set it down in his recital that the portage was only twenty-seven hundred paces.

When the two Miamis had helped to carry the goods and had set the French on the tributary of the great river, they turned back to their own country. Before the men entered the boats Marquette knelt down with them on the bank and prayed for the success of the undertaking. It was a lovely broad river on which they now embarked, with shining sands showing through the clear water, making shallows like tumbling discs of brilliant metal,—a river in which the canoes might sometimes run aground, but one that deceived the eye pleasantly, with islands all vine covered, so when a boat clove a way between two it was a guess how far the Wisconsin spread away on each side to shores of a fertile land. Oaks, walnuts, whitewood, and thorn trees crowded the banks or fell apart, showing prairies rolling to wooded hills. Deer were surprised, stretching their delicate necks down to drink at the margin. They looked up with shy large eyes at such strange objects moving on their stream, and shot off through the brush like red-brown arrows tipped with white. The moose planted its forefeet and stared stolidly, its broad horns set in defense.

"Sieur Jolliet," said the missionary, once when the canoes drew together, "we have now left the waters which flow into the great lakes and are discharged through the St. Lawrence past Quebec to the sea. We follow those that lead us into strange lands."

"This river Miscousing on which we now are," returned Jolliet, "flows, as we see by our compass, to the southwestward. We know it is a branch of the great river. I am becoming convinced, Father, that the great river cannot discharge itself toward the east, as some have supposed."

The explorers estimated the distance from the country of the Mascoutins to the portage to be three leagues, and from the portage to the mouth of the Miscousing forty leagues. This distance they covered in a week. Drawing their canoes to the shore at night, they pitched camp, varying the monotony of their stores with fish and game. Perhaps they had learned that wild grapes then budding were not really fit to eat until touched by frost. Pierre Porteret said in Marquette's hearing, "the Indians could make good wine of grapes and plums if they desired."

The 17th of June, exactly one month from the day on which they had left St. Ignace mission, the explorers paddled into a gentle clear river, larger than the Miscousing but not yet monstrous in width, which ran southward. High hills guarded the right-hand shore, and the left spread away in fair meadows. Its current was broken with many little islands, like the Miscousing, though on sounding, Jolliet found the water to be ten fathoms, or sixty feet, deep. The shores receding, and then drawing in, gave unequal and irregular width to the stream. But it was unmistakably the great river they had sought, named then as now by the Indians, Mississippi, though Marquette at once christened it Conception, and another Frenchman who came after him gave it the name of Colbert. It was the river of which Nicollet had brought hints from his wanderings among northwestern tribes: the great artery of the middle continent, or, as that party of explorers believed, of the entire west. Receiving into itself tributaries, it rolled, draining a mighty basin, to unknown seas.

The first white men ventured forth upon its upper channel in two birch canoes. Five hardy voices raised a shout which was thrown back in an echo from the hills; five caps were whirled as high as paddles could raise them. But Marquette said, "This is such joy as we cannot express!" The men in both canoes silenced themselves while he gave thanks for the discovery.