His eyes fell upon Buffalo Bill and Red Cloud, and he instantly leaped to his feet, with a frightful yell of rage and warning.

In a moment the cavern was alive with the forms of the Cave Dwellers, wakened from their sleep, while those who had been talking at the back also ran forward. All this had happened in a much shorter space of time than the telling takes. The rest of the attacking party had not yet come up, and the blood brothers were in the most deadly peril.

The chief of the Cave Dwellers rushed forward, and in a moment was locked in a death grapple with the border king on the ledge at the mouth of the cave. As the rest of the band came forward, Red Cloud advanced a pace or two to meet them.

Buffalo Bill and the chief of the Cave Dwellers struggled on the edge of the precipice, locked in a deadly embrace; while the brave Navaho, tomahawk in hand, kept the other Indians at bay.

Although he was a man of small stature, the savage chief possessed the strength and ferocity of a giant ape. He strove to throw Buffalo Bill over the cliff, and in his rage he cared not whether he went over with him.

To and fro they swayed, and it seemed as if they must go down to death together, locked in one another’s arms. But with a mighty effort Buffalo Bill overpowered the savage, raised him from the ground, and flung him sheer over the cliff, making a quick turn on his heel as he did so, in order to avoid being carried over himself by the impetus of the falling body.

He had got rid of his dangerous adversary none too soon, for the Cave Dwellers were attacking Red Cloud with great ferocity and would have overpowered him in another moment, although he was making fine play with his tomahawk and had stretched two of the savages dead at his feet.

Buffalo Bill drew his six-shooter and speedily dropped three of the foremost Cave Dwellers. But the rest pressed on to the attack, and the blood brothers had to battle for their lives more desperately than either of them had ever done before, accustomed though they were to wild adventures.

“The last shot, Red Cloud!” gasped Buffalo Bill, after a few moments of rapid firing, as he thrust his second six-shooter into his belt and drew his bowie knife.

The Cave Dwellers, demoralized by the rapidity and accuracy of his aim, had retreated a few paces; but they were getting together again for another rush. The doom of the blood brothers seemed to be sealed.