In later years--especially after the discovery of the Montana gold-mines had drawn to the upper valleys of the Missouri an adventurous, gold-seeking population, who scoured the mountains in all directions--rumors of burning plains, spouting springs, great lakes and other natural wonders, came down from the unknown regions up the Yellowstone. And not content with these, the imagination was freely drawn on, and the treasure valleys of the Arabian Nights were rivalled, if not reproduced. Our over-venturous party, hotly pursued by Indians, escaped, report said, by travelling night after night by the brilliant light of a huge diamond providentially exposed on a mountain. A lost trapper turned up after protracted wandering in this mysterious region, his pockets stuffed with nuggets of gold gathered in a stream which he could never find again. More astounding still was a valley which instantly petrified whatever entered it. Rabbits and sage-hens, even Indians were standing about there, like statuary, among thickets of petrified sage-brush, whose stony branches bore diamonds, rubies, sapphires, emeralds and other gems by the thousand, as large as walnuts. "I tell you, sir," said one who had been there, to Colonel Raynolds, "it is true, for I gathered a quart myself and sent them down the country." The first earnest attempt to explore the valley of the upper Yellowstone was made in 1859, by Colonel Raynolds, of the Corps of Engineers. His expedition passed entirely around the Yellowstone basin, but could not penetrate it. In his report to the War Department, he says: "It was my original desire to go from the head of Wind River to the head of the Yellowstone, keeping on the Atlantic slope, thence down the Yellowstone, passing the lake, and across by the Gallatin to the three forks of the Missouri. Bridger said at the outset that this would be impossible, and that it would be necessary to cross over to the headwaters of the Columbia and back again to the Yellowstone. I had not previously believed that crossing the main crest twice would be more easily accomplished than the transit over what was in effect only a spur; but the view from our first camp settled the question adversely to my opinion at once. Directly across our route lies a basaltic ridge, rising not less than 5,000 feet above us, its walls apparently vertical, with no visible pass or even cañon. On the opposite side of this are the headwaters of the Yellowstone. Bridger remarked triumphantly and forcibly on reaching this spot, 'I told you you could not go through. A bird can't fly over that without taking a supply of grub along.' I had no reply to offer, and mentally conceded the accuracy of the information of 'the old man of the mountains.' * * * * *