If we look at the Great Western Prairies, independently of the political powers to which portions of them respectively belong, we shall find them occupying the whole of that [Pg238] extensive territory lying between the spurs of the Rocky Mountains on the north, and the rivers of Texas on the south--a distance of some seven or eight hundred miles in one direction; and from the frontiers of Missouri and Arkansas on the east to the eastern branches of the southern Rocky Mountains on the west--about six hundred miles in the transverse direction: the whole comprising an area of about 400,000 square miles, some 30,000 of which are within the original limits of Texas, and 70,000 in those of New Mexico (if we extend them east to the United States boundary), leaving about 300,000 in the territory of the United States. This vast territory is not interrupted by any important mountainous elevations, except along the borders of the great western sierras, and by some low, craggy ridges about the Arkansas frontier--skirts of the Ozark mountains. There is, it is true, high on the dividing ridge between Red River and the False Washita, a range of hills, the southwestern portion of which extends about to the 100th degree of longitude west from Greenwich; that is, to the United States {180} boundary line. These are generally called the Witchita mountains, but sometimes _Towyash_ by hunters, perhaps from _tóyavist_, the Comanche word for mountain. I inquired once of a Comanche Indian how his nation designated this range of mountains, which was then in sight of us. He answered, "_Tóyavist_." "But this simply means a mountain," I replied. "How do you distinguish this from any other mountain?" "There are no other mountains in the Comanche territory," he rejoined--"none till we go east to your country, or south to Texas, or west to the land of the Mexican." With these exceptions, there are scarcely any elevations throughout these immense plains which should be dignified by the title of mountains. Those seen by the Texan Santa [Pg239] Fé Expedition about the sources of Red River, were without doubt the _cejas_ or brows of the elevated table plains with which the Prairies abound, and which, when viewed from the plain below, often assume the appearance of formidable mountains; but once upon their summit, the spectator sees another vast plain before him. These _table lands_, or _mesas_, as the Mexicans term them, of which there are many thousands of square miles lying between the frontier of the United States and the Rocky Mountains, are level plains, elevated a considerable distance above the surrounding country, and may be likened to the famous steppes of Asia. They are cut up with numerous {181} streams, the largest of which are generally bordered for several miles back by hilly uplands, which are for the most part sandy, dry and barren.