exclusively, as at this day, to the Gibraltar-like island which rises up, with its picturesque cliffs, from the very depths of Lake Huron. The sketch of this scene of desolation, with the Island in view, is given in the second volume of my _Ethnological Researches_, Plate LIII. After pacing the plain of this ancient point of French settlement in every point, we returned to our tent about eleven o'clock A. M., and deemed it practicable to attempt the crossing to the island in a light canoe, for, although the gale was little if any abated, the wind blew fair. I concurred in the opinion of Captain Douglass that this might be done, and very readily assented to try it, leaving the men in the baggage canoe to effect the passage when the wind fell. It cannot be asserted that this passage was without hazard; for my own part, I had too much trust in my nature to fear it, and, if we were ever wafted on "the wings of the wind," it was on this occasion; our boatmen, volunteers for the occasion, reefing the sails to two feet, and we owed our success mainly to their good management. On rounding the Ottowa point, which is the south cape of the little harbor of 'Mackinac, our friends who had parted from us at Green Bay were among the first to greet us. By the union of these two parties, the circumnavigation of Lake Michigan had been completely made. The rate of travel along the line traversed by them was computed at forty-five miles per day. They had been eight days on the route. The coast line traversed by Captain Douglass and myself, since quitting Chicago, is four hundred and thirty-nine miles, giving a mean of forty-three miles per diem, of which one entire day was lost by head winds. CHAPTER XX. Topographical survey of the northern shores of Green Bay and of the entire basin of Lake Michigan--Geological and Mineralogical indicia of the coast line--Era of sailing vessels and of the steamboat on the lakes--Route along the Huron coast, and return of the expedition to Detroit. The coast line traversed by the party detached from Green Bay on the 22d of August, under Mr. Trowbridge, extended from the north shore of Fox River to the entrance of the Monominee River, and thence around the Little and Great Bay de Nocquet, to the northwestern cape of the entrance of Green Bay. From the latter point, the northern shore of Lake Michigan was traced by the Manistic, and the other smaller rivers of that coast, to the northern cape of the Straits of Michilimackinac, and through these to Point St. Ignace and the Island of Michilimackinac. The line of survey, agreeably to their reckoning, embraced two hundred and eighty miles, thus closing the topographical survey of the entire coast line of the basin of Lake Michigan, and placing in the hands of Captain Douglass the notes and materials for a perfect map of the lake.[146]