That they did so at all was due to the fact that the Navajoes, who had surprised and overcome the guard in the pass, believed they held the only exit from the canyon, which made it impossible for any one to get away, even though they might escape temporarily. If two or three were to escape for the time, the Indians felt that it was impossible for them to get away entirely.

But Professor Septemas Scudmore, with his air ship, was in the canyon, and the boys, half lugging the exhausted Professor Scotch, found him waiting for them, greatly alarmed and excited by the sounds of the battle.

"What does it mean?" cried the lank professor, as the party rushed up. "What is all that shooting and yelling?"

"There is no time to explain now," said Frank. "Get in, everybody, and let's get out of this infernal place as soon as we can! There is not a moment to lose."

"I am bewildered," declared Scudmore. "A moment ago an old man with white hair and beard rushed up to me, bearing a girl in his arms. She had fainted, and he thrust her into the car, telling me to wait for you, and take her away with us."

"It was Old Solitary, and the girl must be Miskel. Is she in the car now?"

"Yes."

"And the man?"

"He is gone."

"It was Old Solitary, sure enough, and he will be able to hide from the savages. We cannot wait for him."