"Consarn that mule," he grumbled, "I'm going to get me a good thick club, and her and me will argue this thing out. Look at that, will you, for pure cussedness."

No wonder the bruised and battered Pete was indignant. The runaway mule stood only a few paces from them, unconcernedly cropping some sort of prickly bush, which no animal but a mule would have had the courage to tackle.

"Mule's ain't human, as I've often observed," grunted Pete, in intense disgust; "they're a mixture of combustibles, hide and devilment, with a dash of red fire thrown in."

"Well, why did you tie the rope round your wrist, then?" asked Jack, untangling the tether, and starting to lead the mule back.

"Don't ask me any questions," roared Pete, rubbing himself affectionately, "or if you do, ask me why I was ever a consarned, peskyfied, locoed idjut enough to cross that bridge."

A sudden disturbance in the brush below them caused them to start and listen intently.

The noise sounded like several animals of some sort making a kind of stampede through the brush.

"The Mexicans!" was the first thought that flashed through Jack's mind. But the next instant he knew it was impossible that it could be they.

"Those are no Mexicans, boy," whispered Pete.