Fired by La Salle's report of his discoveries, two other Frenchmen, Louis Joliet, a native of Quebec, who had already led an expedition in search of the copper mines of Lake Superior, and Jacques Marquette, a Jesuit priest and accomplished linguist, started on a still greater journey. With five companions and two birchbark canoes, they headed down the Wisconsin river, and on June 17, 1673, glided out upon the blue waters of the Mississippi. A fortnight later, they reached a little village called Peoria, where the Indians received them well, and continuing down the river, passed the Missouri, the Ohio, and finally, having gone far enough to convince themselves that the river emptied into the Gulf of Mexico and not into the Gulf of California, they turned about and reached Green Bay again in September, having paddled more than 2,500 miles. Marquette, shattered in health, remained at Green Bay, while Joliet pushed on to Montreal to tell of his discoveries. Marquette rallied sufficiently at the end of a year to attempt a mission among the Illinois Indians, where death found him in the spring of 1675. Joliet spent his last years in a vain endeavor to persuade the government of France to undertake on a grand scale the development of the rich lands along the Mississippi. But the story which Joliet took back with him to Quebec fired anew the ambition of La Salle. He conceived New France as a great empire in the wilderness, and he determined to descend the mighty river to its mouth and establish a city there which would hold the river for France against all comers. Such occupation would, according to French doctrine, give France an indisputable right to the whole territory which the river and its tributaries drained, and La Salle's plan was to establish a chain of forts stretching from Lake Erie to the Gulf, to build up around these great cities, and so to lay the foundations for the mightiest empire in history. We may well stand amazed before a plan so ambitious, and before the determination with which this great Frenchman set about its accomplishment. To most men, such a scheme seemed but the dream of an enthusiast; but La Salle was in deadly earnest, and for eight years he labored to perfect the details of the plan. At last, on April 9, 1682, he planted the flag of France at the mouth of the Mississippi, naming the country Louisiana in honor of his royal master, whose property it was solemnly declared to be. That done, the intrepid explorer hastened back to France; a fleet was fitted out and attempted to sail directly to the mouth of the great river, but missed it; the ships were wrecked on the coast of Texas, and La Salle was shot from ambush by two of his own followers while searching on foot for the river.