The northern bank of the Missouri, for some distance above the confluence of the Osage, is hilly. Moreau's Creek enters three miles above; and at its mouth is Cedar Island, where we anchored for the night. This island is three miles long, and has furnished much cedar timber for the settlements below; but its supply is now nearly exhausted.[111] In the afternoon of the following day we were entangled among great numbers of _snags_ and _planters_, and had a cat-head carried away by one of them. In shutting off the steam on this occasion, one of the valves was displaced; and as we were no longer able to confine the steam, the engine became useless, the boat being thus exposed to imminent danger. At length we succeeded in extricating ourselves; and came to an anchor near the entrance of a small stream, called Mast Creek by Lewis and Clarke.[112] {80} At evening dense cumulostratus and cirrostratus clouds skirted the horizon: above these we observed a comet bearing north-west by north. Above the mouth of the Osage, the immediate valley of the Missouri gradually expands, embracing some wide bottoms, in which are many settlements increasing rapidly in the number of inhabitants. The Manito rocks, and some other precipitous cliffs, are the terminations of low ranges of hills running in quite to the river. These hills sometimes occasion rapids in the river, as in the instance of the Manito rocks; opposite which commences a group of small islands stretching obliquely across the Missouri, and separated by narrow channels, in which the current is stronger than below. Some of these channels we found obstructed by collections of floating trees, which usually accumulate about the heads of islands, and are here called rafts. After increasing to a certain extent, portions of these rafts becoming loosened, float down the river, sometimes covering nearly its whole surface, and greatly endangering the safety, and impeding the progress, of such boats as are ascending. The group above mentioned is called the Thousand Islands. Nashville, Smithton, Rectorsville, and numerous other towns of similar character and name, containing from one to half a dozen houses each, are to be met with in a few miles above the Little Manito rocks. Almost every settler, who has established himself on the Missouri, is confidently expecting that his farm is, in a few years, to become the seat of wealth and business, and the mart for an extensive district.[113]