Mr. Hedges and I forded the Firehole river a short distance below our camp. The current, as it dashed over the boulders, was swift, and, taking off our boots and stockings, we selected for our place of crossing what seemed to be a smooth rock surface in the bottom of the stream, extending from shore to shore. When I reached the middle of the stream I paused a moment and turned around to speak to Mr. Hedges, who was about entering the stream, when I discovered from the sensation of warmth under my feet that I was standing upon an incrustation formed over a hot spring that had its vent in the bed of the stream. I exclaimed to Hedges: "Here is the river which Bridger said was _hot at the bottom_."[AA] How many more geysers than those we saw in eruption there are in this remarkable basin, it is impossible to determine. We will be compelled reluctantly to leave it before it can be half explored. At least a thousand pipes rise to the plain, one or two hundred of which, to all appearances, are as likely to be geysers as any we have seen. This entire country is seemingly under a constant and active internal pressure from volcanic forces, which seek relief through the numberless springs, jets, volcanoes and geysers exhibited on its surface, and which but for these vents might burst forth in one terrific eruption and form a volcano of vast dimensions. It is undoubtedly true that many of the objects we see are of recent formation, and that many of the extinguished craters recently ceased their condition of activity. They are constantly breaking forth, often assuming new forms, and attesting to the active presence of volcanic force. The water in some of the springs presents to the eye the colors of all the precious gems known to commerce. In one spring the hue is like that of an emerald, in another like that of the turquoise, another has the ultra-marine hue of the sapphire, another has the color of the topaz; and the suggestion has been made that the names of these jewels may very properly be given to many of these springs. The packers with the pack train and several of our party broke camp at 9:30 this morning, a few of us remaining for an hour, hoping to have another view of an eruption of the "Giantess;" but in this we were disappointed, for it gave no sign of an eruption, save that the water, visible generally at a depth of about twenty feet, would rise suddenly eight or ten feet in the well, and as suddenly fall again.