In some instances the volumes were projected obliquely upward, and fell into the neighboring fountains, or on the rock or prairie. But their ascent was generally perpendicular, falling in and about their own basins or apertures. "These wonderful productions of nature are situated near the center of a small valley, surrounded by pine-covered hills, through which a small fork of the Madison flows." Here we have a description, as from the pen of some earlier Doane or Langford, free from exaggeration and true to the facts. No one who has seen the Upper Geyser Basin will question its general correctness. The writer then goes on to relate what he has learned from others, but here exaggeration creeps in and this part of his narrative is less reliable. It continues: "From several trappers who had recently returned from the Yellow Stone, I received an account of boiling springs that differ from those seen on Salt River only in magnitude, being on a vastly larger scale; some of their cones are from twenty to thirty feet high, and forty to fifty paces in circumference. Those which have ceased to emit boiling, vapor, etc., of which there were several, are full of shelving cavities, even some fathoms in extent, which give them, inside, an appearance of honey-comb. The ground for several acres extent in vicinity of the springs is evidently hollow, and constantly exhales a hot steam or vapor of disagreeable odor, and a character entirely to prevent vegetation. They are situated in the valley at the head of that river near the lake, which constitutes its source. "A short distance from these springs, near the margin of the lake, there is one quite different from any yet described. It is of a circular form, several feet in diameter, clear, cold and pure; the bottom appears visible to the eye, and seems seven or eight feet below the surface of the earth or water, without meeting any resistance. What is most singular with respect to this fountain is the fact that at regular intervals of about two minutes, a body or column of water bursts up to the height of eight feet, with an explosion as loud as the report of a musket, and then falls back into it; for a few seconds the water is roily, but it speedily settles and becomes transparent as before the effusion. A slight tremulous motion of the water, and a low rumbling sound from the caverns beneath, precede each explosion. This spring was believed to be connected with the lake by some subterranean passage, but the cause of its periodical eruptions or discharges, is entirely unknown. I have never before heard of a cold spring, whose waters exhibit the phenomena of periodical explosive propulsion, in form of a jet. The geysers of Iceland, and the various other European springs, the waters of which are projected upwards, with violence and uniformity, as well as those seen on the head waters of the Madison, are invariably hot."