He had just perceived a horseman motionless in the arroyo who, although unnoticed by them, had evidently been seen by the Mexicans.

He had apparently leaped into it from the bank, and had halted as if to witness this singular incident.

As the clatter of the vaqueros' hoofs died away he lightly leaped the bank again and disappeared.

But in that single glimpse of him they recognized Jack Hamlin.

When they reached the spot where he had halted, they could see that he must have approached it from the trail where they had previously seen him, but which they now found crossed it at right angles.