Sunday, September 18, evening.—We left our morning camp about 9 o'clock, pursuing our uncertain course through fallen timber for a distance of about three miles, when we had all our fears of misdirection relieved by coming suddenly upon the banks of the Firehole river, the largest fork of the Madison, down which we followed five miles, passing several groups of boiling springs and a beautiful cascade[[Y]] (to which we gave no name), when we emerged from the dense forest into a sequestered basin two miles above the union of the Firehole river with a stream which comes in from the southwest, the basin extending to the width of a mile, and traversing the river until contracted between proximate ranges two miles below our camp.
I have spent the entire afternoon and part of this evening in examining the geysers and springs, but will not further record the explorations of to-day until we are ready to leave the basin.
Monday, September 19.—When we left Yellowstone lake two days ago, the desire for home had superceeded all thought of further explorations. Five days of rapid travel would, we believed, bring us to the upper valley of the Madison, and within twenty-five miles of Virginia City, and we indulged the remote hope that we might there find some trace of Mr. Everts. We had within a distance of fifty miles seen what we believed to be the greatest wonders on the continent. We were convinced that there was not on the globe another region where within the same limits Nature had crowded so much of grandeur and majesty with so much of novelty and wonder. Judge, then, of our astonishment on entering this basin, to see at no great distance before us an immense body of sparkling water, projected suddenly and with terrific force into the air to the height of over one hundred feet. We had found a real geyser. In the valley before us were a thousand hot springs of various sizes and character, and five hundred craters jetting forth vapor. In one place the eye followed through crevices in the crust a stream of hot water of considerable size, running at nearly right angles with the river, and in a direction, not towards, but away from the stream. We traced the course of this stream by the crevices in the surface for twenty or thirty yards. It is probable that it eventually flows into the Firehole, but there is nothing on the surface to indicate to the beholder the course of its underground passage to the river.
On the summit of a cone twenty-five feet high was a boiling spring seven feet in diameter, surrounded with beautiful incrustations, on the slope of which we gathered twigs encased in a crust a quarter of an inch in thickness. On an incrusted hill opposite our camp are four craters from three to five feet in diameter, sending forth steam jets and water to the height of four or five feet. But the marvelous features of this wonderful basin are its spouting geysers, of which during our brief stay of twenty-two hours we have seen twelve in action. Six of these threw water to the height of from fifteen to twenty feet, but in the presence of others of immense dimensions they soon ceased to attract attention.
Of the latter six, the one we saw in action on entering the basin ejected from a crevice of irregular form, and about four feet long by three wide, a column of water of corresponding magnitude to the height of one hundred feet. Around this crevice or mouth the sediment is piled in many capricious shapes, chiefly indented globules from six inches to two feet in diameter. Little hollows in the crust filled with water contained small white spheres of tufa, of the size of a nutmeg, formed as it seemed to me around some nuclei.[[Z]]
We gave such names to those of the geysers which we saw in action as we think will best illustrate their peculiarities. The one I have just described General Washburn has named "Old Faithful," because of the regularity of its eruptions, the intervals between which being from sixty to sixty-five minutes, the column of water being thrown at each eruption to the height of from eighty to one hundred feet.
The "Fan" has a distorted pipe from which are projected two radiating sheets of water to the height of sixty feet, resembling a feather fan. Forty feet from this geyser is a vent connected with it, two feet in diameter, which, during the eruption, expels with loud reports dense volumes of vapor to the height of fifty feet.
The "Grotto," so named from the singularly winding apertures penetrating the sinter surrounding it, was at rest when we first discovered it. Externally it presented few indications of its character as a geyser. Private Williamson, one of our escort, crawled through an aperture and looked into the discharging orifice. When afterwards, he saw it belching forth a column of boiling water two feet in diameter to the height of sixty feet, and a scalding stream of two hundred square inches flowing from the cavern he had entered a short time before, he said that he felt like one who had narrowly escaped being summarily cooked.