Of course no harm was done, and Frank only smiled grimly.

He sent the Steam Man up the gorge, and in a few moments came out upon the plain, which was deep among the hills and hemmed in with a line of timber.

The cowboys continued to pour volley after volley into the Steam Man.

Frank waited until he had reached a favorable position.

Then he stopped the Steam Man, and picking up his rifle, said:

“Come, boys! let’s give them as good as they send.”

Of course Pomp and Barney were ready and eager.

A destructive fire was sent into the covert of the cowboys.

In a few moments it grew so hot that they could not remain there and had to get out.

With baffled yells they retreated deeper into the hills.