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Rh might convert into oases—are the cotton-wood and willow, to which the mezquite may be added in the southern latitudes. The desert is mostly uninhabited, unendurable even to the wildest Indian. But the people on its eastern and western frontiers, namely, those holding the extreme limits of the fertile prairie, and those occupying the desirable regions of the western mountains, are, to quote the words of Lieutenant Gouverneur K. Warren, U.S. Topographical Engineers, whose valuable reconnaissances and explanations of Nebraska in 1855, '56, and '57 were published in the Reports of the Secretary of War, "on the shore of a sea, up to which population and agriculture may advance and no farther. But this gives these outposts much of the value of places along the Atlantic frontier, in view of the future settlements to be formed in the mountains, between which and the present frontier a most valuable trade would exist. The western frontier has always been looking to the east for a market; but as soon as the wave of emigration has passed over the desert portion of the plains, to which the discoveries of gold have already given an impetus that will propel it to the fertile valleys of the Rocky Mountains, then will the present frontier of Kansas and Nebraska become the starting-point for all the products of the Mississippi Valley which the population of the mountains will require. We see the effects of it in the benefits which the western frontier of Missouri has received from the Santa Fé tract, and still more plainly in the impetus given to Leavenworth by the operations of the army of Utah in the interior region. This flow of products has, in the last instance, been only in one direction; but when those mountains become settled, as they eventually must, then there will be a reciprocal trade materially beneficial to both."

The mountain region westward of the sage and saleratus desert, extending between the 105th and 111th meridian (G.)—a little more than 400 miles—will in time become sparsely peopled. Though in many parts arid and sterile, dreary and desolate, the long bunch grass (Festuca), the short curly buffalo grass (Sisleria dactyloides), the mesquit grass (Stipa spata), and the Gramma, or rather, as it should be called, "Gamma" grass (Chondrosium fœnum), which clothe the slopes west of Fort Laramie, will enable it to rear an abundance of stock. The fertile valleys, according to Lieutenant Warren, "furnish the means of raising sufficient quantities of grain and vegetables for the use of the inhabitants, and beautiful healthy and desirable locations for their homes. The remarkable freedom here from sickness is one of the attractive features of the region, and will in this respect go far to com-