Local proof also is not wanting. In the fall, when the freshets are over and the waters of the Columbia are clear, one going out in a small boat just above the cascades and looking down into the transparent depths can see submerged forest trees beneath him, still standing upright as they stood before the bridge fell in and the river was raised above them. It is a strange, weird sight, this forest beneath the river; the waters wash over the broken tree-tops, fish swim among the leafless branches: it is desolate, spectre-like, beyond all words. Scientific men who have examined the field with a view to determining the credibility of the legend about the bridge are convinced that it is essentially true. Believed in by many xtribes, attested by the appearance of the locality, and confirmed by geological investigation, it is surely entitled to be received as a historic fact.