The Lone Star Ranger by Zane Grey

West of the Pecos River Texas extended a vast wild region, barren in the north where the Llano Estacado spread its shifting sands, fertile in the south along the Rio Grande. A railroad marked an undeviating course across five hundred miles of this country, and the only villages and towns lay on or near this line of steel. Unsettled as was this western Texas, and despite the acknowledged dominance of the outlaw bands, the pioneers pushed steadily into it. First had come the lone rancher; then his neighbors in near and far valleys; then the hamlets; at last the railroad and the towns. And still the pioneers came, spreading deeper into the valleys, farther and wider over the plains. It was mesquite-dotted, cactus-covered desert, but rich soil upon which water acted like magic. There was little grass to an acre, but there were millions of acres. The climate was wonderful. Cattle flourished and ranchers prospered.

The Rio Grande flowed almost due south along the western boundary for a thousand miles, and then, weary of its course, turned abruptly north, to make what was called the Big Bend. The railroad, running west, cut across this bend, and all that country bounded on the north by the railroad and on the south by the river was as wild as the Staked Plains. It contained not one settlement. Across the face of this Big Bend, as if to isolate it, stretched the Ord mountain range, of which Mount Ord, Cathedral Mount, and Elephant Mount raised bleak peaks above their fellows. In the valleys of the foothills and out across the plains were ranches, and farther north villages, and the towns of Alpine and Marfa.