The cold water geyser above described, although, apparently a myth, may not have been so after all. In many places along the west shore of the Yellowstone Lake there are visible protuberances in the water surface where boiling springs from beneath force the cold water upward. It is quite possible that this spring was so connected with the lake as to keep constantly filled with cold water to a considerable depth; and that the eruptive energy of the spring was expended in lifting the superincumbent mass without giving any visible indication of the thermal action below. The whole article forms the most interesting and authentic reference to the geyser regions published prior to 1870. It proves beyond question that a knowledge of this region existed among the early trappers, and confirms our previous deduction that the wide range of the fur business could not have left it unexplored. In a letter addressed by General Bonneville to the Montana Historical Society,[R] since the creation of the Yellowstone Park, he states that, at the time of his sojourn in the mountains, in 1831-4, the geyser regions were known to his men, although he had not personally seen them. He also remembered having seen the trader Alvarez, referred to in the above article. [R] See Appendix E, "Transactions Montana Historical Society." In 1844, a large party of trappers entered the Upper Yellowstone Valley from the south, passed around the west shore of the Yellowstone Lake to the outlet, where they had a severe battle with the Blackfeet Indians, in a broad open tract at that point. The remains of their old corral were still visible as late as 1870. There are numerous other interesting, though less definite, references to an early knowledge of the Yellowstone; but those we have given show their general character. The important fact to remember is that this knowledge was barren of result. For the most part it existed only in the minds of illiterate men, and perished with them. It never caught the public ear and did not in the least degree hasten the final discovery. Historically interesting these early adventures will always be; as are also the Norse voyages to America; but they are very far from being the Columbus voyage of discovery. CHAPTER VI. JAMES BRIDGER.