The crater of this geyser is very beautiful, though, being but slightly elevated above the general slope of the plateau, it might easily be overlooked, should it not happen to play during the visit of an examining party. There are three openings. One, a very small aperture, emits puffs of steam, similar to the exhaust-pipe of a steam engine. The large one in the centre, six feet across, boils violently during an eruption, but does not throw water to a great height. The third opening is the geyser proper. It is twelve by eighteen inches in diameter, somewhat narrowed as it descends, and is of great depth--smooth and straight. These cavities are all lined with delicate deposit, beautifully enamelled, in appearance as delicate as frost-work, but hard and strong, requiring the assistance of a hammer to detach fragments for specimens. Soon after Colonel Barlow entered the basin he witnessed a grand eruption of this geyser. He says: "A roar was heard near the hill-side a hundred yards distant, and upon rushing out in that direction we saw a huge mass of steam issuing from a crater at the base of the hill, accompanied by a column of water rising to a height far exceeding that of any geyser yet seen. This grand fountain continued to play for several minutes, when, having subsided, I approached to obtain a closer view of the aperture whence had issued such a powerful stream. A sudden gush of steam drove me away, following which the water was again impelled upward and upward, far above the steam, until it seemed to have lost the controlling force of gravity. The roar was like the sound of a tornado, but there was no apparent effort--a steady stream, very graceful and perfectly vertical, except as a slight breeze may have waved it to and fro. Strong and smooth, it continued to ascend, like the stream from a powerful steam fire-engine. We were all lost in astonishment at the sudden and marvellous spectacle. I have no hesitancy in stating that this geyser played to the height of over two hundred feet. It commenced at five o'clock in the afternoon and continued twenty minutes. "The enthusiasm of the party as they watched this wondrous display knew no bounds. Those who were usually loud and boisterous in the exhibition of their feelings, became subdued and simply gazed in silent awe; while the more sober members seemed to lose their natural gravity and manifested their delight in shouts of rapture. For myself, I remember trying to obtain a view of the fountain from all points of the compass at once, and was brought to a realizing sense of the difficulties attending the execution of this desire, by discovering that I was waiting in the torrent of hot water which was now flooding the nearly level surface of the surrounding rock. "After the grand column of water subsided, vast clouds of steam, were for some time ejected from the throat of the geyser, and also from a small rent close beside the main orifice.