And Captain Lewis continues to describe it as it was: "here the river pitches over a shelving rock, with an edge as regular and as streight as if formed by art, without a nich or brake in it; the water de­cends in one even and uninterupted sheet to the bottom wher dashing against the rocky bottom rises into foaming billows of great hight and rappidly glides away, hising flashing and sparkling as it departs the sprey rises from one extremity to the other to 50 f."