Huron and Ottawa Indians, with the priest left in charge of them, stood on the beach to see Marquette embark,--the water running up to their feet and receding with the everlasting wash of the straits. Behind them the shore line of St. Ignace was bent like a long bow. Northward, beyond the end of the bow, a rock rose in the air as tall as a castle. But very humble was the small mission station which Father Marquette had founded when driven with his flock from his post on the Upper Lakes by the Iroquois. A chapel of strong cedar posts covered with bark, his own hut, and the lodges of his people were all surrounded by pointed palisades. Opposite St. Ignace, across a league or so of water, rose the turtle-shaped back of Michilimackinac Island, venerated by the tribes, in spite of their religious teaching, as a home of mysterious giant fairies who made gurgling noises in the rocks along the beach or floated vast and cloud-like through high pine forests. The evergreens on Michilimackinac showed as if newborn through the haze of undefined deciduous trees, for it was May weather, which means that the northern world had not yet leaped into sudden and glorious summer. Though the straits glittered under a cloudless sky, a chill lingered in the wind, and only the basking stone ledges reflected warmth. The clear elastic air was such a perfect medium of sight that it allowed the eye to distinguish open beach rims from massed forests two or three leagues away on the south shore, and seemed to bring within stone's throw those nearer islands now called Round and Bois Blanc. It must have wrung Marquette's heart to leave this region, which has an irresistible charm for all who come within its horizon. But he had long desired to undertake this journey for a double purpose. He wanted to carry his religion as far as possible among strange tribes, and he wanted to find and explore that great river of the west, about which adventurers in the New World heard so much, but which none had seen. [Illustration: Totem of the Illinois.] A century earlier, its channel southward had really been taken possession of by the Spaniards, its first discoverers. But they made no use of their discovery, and on their maps traced it as an insignificant stream. The French did not know whether this river flowed into the Gulf of California--which was called the Red Sea--or to the western ocean, or through Virginia eastward. Illinois Indians, visiting Marquette's mission after the manner of roving tribes, described the father of waters and its tributaries. Count Frontenac, the governor of Canada, thought the matter of sufficient importance to send Louis Jolliet with an outfit to join the missionary in searching for the stream.