His lynx eyes detected stealthy forms moving through the grass, and he readily conjectured that the enemy must be coming upon him after all.

They came very near stealing a march on him by sending some of their men around to the other side of the wagons, and had it not been for the quick ears of a sentry posted at that part much damage might have been done.

But the alarm was given, the sentries all came in, and everything was prepared for defense.

At this moment, just when a perfect stillness hung over everything, the sound of a shrill whistle came distinctly over the plains.

“That’s the Steam Horse,” said Max. “They’ll soon be here.”

“Whoop!”

A shrill yell rang out.

Then came a chorus of horrid yells, and the redskins rushed forward.

Crash!

A random volley was poured in over the shafts of the wagons.