Currumpaw is a vast cattle range in northern New Mexico. It is a land of rich pastures and teeming flocks and herds, a land of rolling mesas and precious running waters that at length unite in the Currumpaw River, from which the whole region is named. And the king whose despotic power was felt over its entire extent was an old gray wolf. Old Lobo, or the king, as the Mexicans called him, was the gigantic leader of a remarkable pack of gray wolves, that had ravaged the Currumpaw Valley for a number of years. All the shepherds and ranchmen knew him well, and, wherever he appeared with his trusty band, terror reigned supreme among the cattle, and wrath and despair among their owners. Old Lobo was a giant among wolves, and was cunning and strong in proportion to his size. His voice at night was well-known and easily distinguished from that of any of his fellows. An ordinary wolf might howl half the night about the herdsman's bivouac without attracting more than a passing notice, but when the deep roar of the old king came booming down the cañon, the watcher bestirred himself and prepared to learn in the morning that fresh and serious inroads had been made among the herds.