Shepherds of the Wild by Edison Marshall — Read

While José Mertos had been riding, Landy Fargo had been busy, too. It wasn't enough just to order things done, and later to learn of their accomplishment. In the hand, more than the brain, lies the gratification of vengeance; and Fargo didn't intend to miss this satisfaction. Riding swiftly, he had lighted the circle of fires in front of the sheep flock.

Exultation was upon him when he saw the red, greedy flames creeping into the trees. It was his long-awaited moment. By no conceivable circumstances could the flock and its shepherd escape. He had prepared for every emergency, blockaded every pass.