Perhaps the most perfect and beautiful of all Indian fire myths of the Columbia, is that connected with the famous "tomanowas bridge" at the Cascades. This myth not only treats of fire, but it also endeavours to account for the peculiar formation of the river and for the great snow peaks in the near vicinity. This myth has various forms, and in order that it may be the better understood, we shall say a word with respect to the peculiar physical features in that part of the Columbia. The River, after having traversed over a thousand miles from its source in the heart of the great Rocky Mountains of Canada, has cleft the Cascade Range asunder with a canyon three thousand feet in depth. While generally swift, that portion between The Dalles and the Cascades is deep and sluggish. There are, moreover, sunken forests on both sides visible at low water, which seem plainly to indicate that at that point the river was dammed up by some great rock slide or volcanic convulsion. Some of the Indians affirm that their grandfathers have told them that there was a time when the river at that point passed under an immense natural bridge, and that there were no obstructions to the passage of boats under the bridge. At the present time there is a cascade of forty feet at that point. This is now overcome by government locks. Among other evidences of some such actual occurrence as the Indians relate, is the fact that the banks at that point are gradually sliding into the river. The prodigious volume of the Columbia, which here rises from fifty to seventy-five feet during the summer flood, is continually eating into the banks. The railroad has slid several inches a year at this point toward the river and requires frequent readjustment. It is obvious at a slight inspection that this weird and sublime point has been the scene of terrific volcanic and probably seismic action. One Indian legend, probably the best known of their stories, is to the effect that the downfall of the bridge and consequent damming of the river was due to a battle between Mt. Hood and Mt. Adams,--or, some say, Mt. St. Helens--in which Mt. Hood hurled a great rock at his antagonist; but, falling short of the mark, the rock demolished the bridge instead. This event has been made use of by Frederick Balch in his story, _The Bridge of the Gods_.