If he could have done so, and could have got hold of the reins once, he could easily have stopped the horse.

But this he was unable to do.

As a result, the animal carried him along swiftly, and along the base of the hills.

Suddenly the mustang swerved and darted into a narrow pass.

Barney, at the loop-holes of the wagon with rifle in hand, had been sorely tempted to fire at the runaway.

But the fear of hitting Pomp had restrained him.

Now, however, the horse was out of range. But Frank headed the Steam Man for the pass.

Fortunately, it was unobstructed by bowlders, and had a good level floor. The Steam Man was enabled to forge along with safety.

But the mustang and his black rider had gone from sight. However the pursuers kept on.

Suddenly they came out upon a broad plateau with steep descent upon all other sides. This extended among the hills for a distance of several miles.