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I noticed several varieties of clays in the river banks exposed by the attrition of the water—of these were the white, red, black, yellow, blue, and green.

The white clay is much used by the Indians in cleaning skins and robes; an operation performed by mixing it with water till the compound assumes the color and about four times the consistency of milk, when it is applied to the surface of the article in hand; the robe or skin thus washed, after being thoroughly dried in the sun, is rubbed until it becomes soft and pliable from friction, and the grosser particles of the preparation are loosened and removed.

By this simple process skins assume a milky whiteness, and every spot of grease or dirt is made to disappear.

All kinds of skin may be thus cleansed, and will readily attain an unsoiled purity, surpassing that originally possessed. Red, yellow, black, blue, or any other kind of clay, may be used for like purposes, and will readily impart to the cleansed articles their own color.

In case a single application is insufficient, repeat the process for two or three times, and there can be no possible failure in the result, provided the clay is pure and good.

Some twenty miles above the Forks, we passed a ridge of rocky hills exhibiting layers of limestone and sandstone in bold escarpments, that jutting into the river

from the right, formed a high embankment covered with pines and cedars, known as Cedar Bluff.

At the upper side of this point stood the remains of an old Pawnee village, which had been deserted by its inhabitants immediately after the bloody battle between that nation and the Sioux, at the mouth of Ash creek.

The bottom, for several miles above, is rarely excelled in fertility. The islands are generally timbered, but the river banks upon both sides are almost entirely destitute of trees of any kind.

From Cedar Bluff, in about eight miles, we came to the mouth of a large and beautiful creek, forcing its way, with a clear and rapid current, from the high rolling prairies to the north. This presented the appearance of being skirted with broad and fertile bottoms, well supplied with timber among the hills. Though vested with some importance on account of its size and locality, it is as yet nameless — the abundance of plovers in its vicinity at the time of my passing, suggested the term "Plover creek" as a proper appellation.

Five or six miles further on, we came to a large grove of cottonwood upon the right shore. Here, some five years since, a company of traders, while descending the Platte in boats loaded with furs, made cache of one hundred and sixty packs of robes, which they were compelled to leave on account of the low stage of the water. The luckless party, after enduring great hardships, arrived in the States; but their cache was subsequently plundered by Pawnees.

The confluence of the North and South Forks made but little perceptible difference in the size of the river. From the junction, in five days' time we reached the vicinity of Grand Island, about two hundred and twenty miles from the nearest white settlements.