"Why, how could I," he asked, "until it became a question of life or death? It's too bad I had to lose them," and he shook his head mournfully at the thought.

The journey was soon resumed, the Wondership rising buoyantly out of the dismal canyon. They were not sorry to get back to the upper air for the gloom of the deep gulch had affected their spirits. But so much time had been consumed in getting the professor out of his predicament that it was not long before twilight set in and they still had caught no glimpse of anything resembling the island they were in search of.

They decided to come to earth and make camp for the night and resume the search in the morning. They made a hearty supper off the venison which remained, and turned in, without setting any watch, as there was no necessity for it out there with not a soul about for scores of miles.

It was about midnight when Jack was awakened by a wild yell from Tom.

"Ow! Ouch! Leggo my toe!" the younger of the Boy Inventors was shouting.


CHAPTER XXX.

NIGHT ON THE COLORADO.

"What's the matter? What has happened?" cried Jack.