She raised her quirt and brought it down upon her pony’s flank. He sprang forward under the lash but was not quick enough to escape the mad stallion. That brute got directly in the path and they collided.

Ruth was almost unseated, while the clashing teeth of the free horse barely grazed her legging. He snapped again at the rump of the plunging pony, but missed.

The girl was seriously frightened. What Ben Lester and the other cowpuncher had said about the stallion seemed to be true. Did he have hydrophobia just the same as a dog that runs mad?

Whether the beast was afflicted with the rabies or not, Ruth did not want either herself or the pony bitten. She had seen enough of half-tamed horses on Silver Ranch in Montana to know that there is scarcely an animal more savage than a wild stallion.

And if this black and white beast had eaten of the loco weed which, in some sections of the Southwest is quite common, he was much more dangerous than the bear Min Peters had shot as they came over from Yucca.

She tried to start her pony along the bottom of the arroyo on the back track; but the squealing stallion had got around behind them and again charged with open jaws, the froth flying from his curled-back lips.

So she wheeled her mount, clinging desperately with her knees to his heaving sides, and once more lashed him with the quirt.

Since she had ridden him that first day out of Yucca Ruth had been in the saddle almost every day since; but so far she had never had occasion to use the whip on her pony. He was a spirited bit of horseflesh, not much more than half the size of the stallion. The quirt embittered him.

Although he wheeled to run, facing down the arroyo again, he began to buck instead. His heels suddenly were thrown out and just grazed the stallion’s nose, while Ruth came close to flying out of her saddle and over his head.

If she was once unhorsed Ruth suddenly realized that her fate would be sealed. The stallion rose up on his hind legs, squealing and whistling, and struck at her with his sharp hoofs.