The pack-train continued its course along the side of the mountain, and went into camp after a march of only twelve miles. That evening, Messrs. Washburn, Doane, and Hedges went on ahead of the main party, discovering the extensive mud springs at the southern base of the mountain, and finally reached the verge of a cliff beyond which yawned the stupendous cañon of the Yellowstone. It was the first real view from near by, but darkness prevented further examination. The next day saw the arrival of the party at the Falls of the Yellowstone, close by the mouth of Cascade Creek, which, with its Crystal Falls, received that day their present names. The remainder of this day, August 30th, and the next, were spent in exploring the cañon and measuring the heights of the falls. Messrs. Hauser and Stickney descended the sides of the cañon to the brink of the river about two miles below the falls; and Lieutenant Doane and Private McConnell accomplished the same difficult feat further down. It needs not to be said that the members of the party were profoundly impressed with the incomparable scenery of the Grand Cañon, although their descriptions of it are, perhaps, least satisfactory of any they have left us. From the Cañon the party ascended the now placid river amid ever-changing wonders. They passed Sulphur Mountain and the uncanny region around the Mud Volcano and Mud Geyser, then crossed to the east shore of the river, and finally went into camp, September 3d, on the shore of the Yellowstone Lake. Here our explorers were again in ecstacies, and not without cause; for, seen under favoring conditions, this "watery solitude" is one of the most beautiful objects in nature. After a day spent in this camp, the expedition continued by slow stages up the east shore of the lake. Messrs. Doane and Langford scaled the lofty Absaroka Range just east of the lake, being the first white men known to have accomplished this feat, and their names now designate two of its noblest summits. September 7th, the party forded the Upper Yellowstone and traversed the almost impassable labyrinths of fallen timber between the several projecting arms. on the south of the lake. It was on this portion of the route, September 9th, that Mr. Everts became separated from his party, lost his horse with all his accoutrements, and commenced those "thirty-seven days of peril," which so nearly cost him his life. This unfortunate affair cast a deep gloom over the little party and seriously interfered with the progress of the expedition. A week was spent in searching for the lost companion, without other result than the discovery of the hot springs basins at Hart Lake and on the west shore of the Yellowstone Lake.