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The bottom upon the south bank is between three and four miles broad and of a light, deep, and, rich soil, occasionally sandy, but covered with thick and lusty vegetation. Back from the valley, ranges of broken sand-hills mark the transition to the high arid prairies in the rear, where vegetation becomes more dwarfish and stinted in its growth, and is intermingled with frequent cacti.

These immense plains are generally clad with a short, curly grass, (the buffalo grass,) very fine and nutritious, and well adapted to the sustenance of the countless herds of buffalo and other wild animals that feed upon it. Their soil is generally of a thin vegetable mould, upon a substratum of indurated sand and gravel.

In many places it is quite sterile, producing little other than sand-burrs and a specimen of thin, coarse grass, that sadly fail to conceal its forbidding surface; in

the grand prairies, the powder-waggon accidentally caught fire, which was noticed immediately by the Mexican attendants, who hurriedly clasped it upon all sides, to prevent the vehicle from being blown to pieces while one of them proceeded deliberately to extinguish the flames! Neither could we stand comparison with a lieutenant of the Mexican army, at Santa Fe, who, on opening a keg of powder, made use of a RED-HOT IRON in lieu of an auger, for that purpose. It is needless to say, a tremendous explosion followed. Several of the bystanders were killed, but the lieutenant miraculously escaped. He soon after received a Captain's commission from the Commander-in-chief, in consideration of his indomitable COURAGE!

5 The Sioux have bestowed the appellation of Duck river upon the North Fork of Platte.

others, it is but little better than a desert waste of sand-hills or white sun-baked clay, so hard and impervious that neither herb nor grass can take root to grow upon it; and in others, it presents a light superfice, both rich and productive, beclad with all that can beautify and adorn a wilderness of verdure.

The springs and streams of water are "few and far between,"—an evil, however, slightly atoned for by the occasional pools formed in favoring depressions during the rainy season, which are retained in their places by the extreme hardness of the soil. Were it not for these it would be almost impossible, in many directions, to travel the vast prairies lying between the Arkansas and Missouri, from long. 22° 30' west from Washington to the Rocky Mountains. That this section of country should ever become inhabited by civilized man, to any extent, except in the vicinity of large water-courses, is an idea too preposterous to be entertained for a single moment.

As the reader is now inducted to the grand prairie as it is, it may not be amiss to say something relative to this phenomenon, before dismissing the subject in hand.

The steppes of Asia, the pampas of South America, and the prairies of the great West, so far as my information extends, are possessed of one general and uniform character. There is something deeply mysterious associated with them, that puzzles the philosopher and cosmogonist to explain. Why is it neither timber nor shrubs, as a general thing, are found within their confines? Why have not the same causes operated here which produced the stately forests of other regions?

The above questions are often asked, and as often answered; but never satisfactorily.

Some respond by a reference to their frequent burnings, —others to some chemical defect in their soil, —others, to the disgeniality of their climate, —others, to their infecund aridity, —and yet, others, to the supposition that some operation of nature or art has effected the destruction of quondam forests, and reduced them to their present condition.

Each of these answers, though, doubtless, partially true in many respects, fails to solve the problem before us.

Here we have, in many places, almost measureless extents of fertile soil, moist and abundantly watered, by rains, springs, and ever-flowing streams, with all the desiderata for the producing of trees, —and what withholds