It was August 26th when the expedition entered the present territory of the Park. Lieutenant Doane and Mr. Everts, with one soldier and two hunters picked up on the way, rode in advance along the brink of the Third Cañon and across the high plateau between the Gardiner and Tower Creek, camping at nightfall upon the latter stream. In the broad open valley near the junction of the Yellowstone and East Fork, a small tepid sulphur spring gave them the first evidence of their approach to the regions of volcanic activity. Next day, the remainder of the party arrived. Two days were spent in examining the beautiful Tower Falls, and--to our tyros in geyser exploration--the wonderful hot spring formations to be seen at that point. Here they also had for the first time glimpses of the Grand Cañon of the Yellowstone. The party left Tower Creek on the 29th of August, and followed up the river over the east flank of Mount Washburn. As their progress lifted them rapidly above the surrounding country, a marvelously beautiful landscape unfolded itself to their view. Presently an interesting incident occurred, which shall stand here in Lieutenant Doane's own language: "Through the mountain gap formed by the cañon, and on the interior slopes some twenty [evidently a misprint] miles distant, an object now appeared which drew a simultaneous expression of wonder from every one of the party. A column of steam, rising from the dense woods to the height of several hundred feet, became distinctly visible. We had all heard fabulous stories of this region, and were somewhat skeptical of appearances. At first it was pronounced a fire in the woods, but presently some one noticed that the vapor rose in regular puffs, as if expelled with great force. Then conviction was forced upon us. It was indeed a great column of steam, puffing away on the lofty mountain side, escaping with a roaring sound audible at a long distance, even through the heavy forest. A hearty cheer rang out at this discovery, and we pressed onward with renewed enthusiasm." The party then ascended the lofty mountain to their right, now known as Mt. Washburn, and from its summit looked around upon the vast panorama which is now included in the Yellowstone National Park. Had old James Bridger been present at that moment, he would have received ample vindication for long-standing injustice at the hands of his incredulous countrymen. _There_ were the Cañon and Falls and Lake of the Yellowstone, with evidence enough of boiling springs and geysers! The enthusiasm of the party was unbounded, and Lieutenant Doane exultingly declares that they were "more than satisfied with the opening up of the campaign."