The mouth of the Konzas river was so filled with mud, deposited by the late flood in the Missouri, as scarcely to admit the passage of our boat, though with some difficulty we ascended that river about a mile, and then returning dropped anchor opposite its mouth. The spring freshets subside in the Konzas, the Osage, and all those tributaries that do not derive their sources from the Rocky Mountains, before the Missouri reaches its greatest fulness; consequently the waters of the latter river, charged with mud, flow into the mouths of its tributaries, and there becoming nearly stagnant, deposit an extensive accumulation of mud and slime. The Konzas river has a considerable resemblance to the Missouri; but its current is more moderate, and the water less turbid, except at times of high floods. Its valley, like that of the Missouri, has a deep and fertile soil, bearing similar {102} forests of cotton-wood, sycamore, &c., interspersed with meadows; but, in ascending, trees become more and more scattered, and at length disappear almost entirely, the country, at its sources, being one immense prairie.[140] We sailed from the mouth of the Konzas on the 13th of August. Numerous sand-bars occur in the Missouri above that point, and these occasioned us some delay. The water having fallen several feet, we had less velocity of current to contend against, but found it more necessary to keep in the channel, and could not so often take advantage of the eddy currents below the points and along the shore. A party of white hunters were encamped on the Missouri, not far above the Konzas. In the rudeness of their deportment and dress, they appeared to us to surpass the savages themselves. They are usually the most abandoned and worthless among the whites who adopt the life of wandering hunters: frequently they are men whose crimes have excluded them from society. Eighteen miles above the Konzas river, and five above the Little Platte, is a large island, which, from its rhombic form, has received the name of Diamond island. The principal channel is on the north side. It is difficult to pass, being much obstructed by sand-bars. Four miles above this is a small group, called the Three Islands; and two miles further another cluster, known as the Four Islands, and by the French as the Isles des Parcs, or Field Islands. At each of these places, as in the neighbourhood of islands generally, the navigation is difficult.[141]