The man did as he was told. In a few moments half a dozen candles provided a fair amount of light in the gloom of the cave.

"That's better."

Just then there was a shout from the passage leading into the main cave. Gus Montrose wheeled about.

"Who's that?"

The men crouched tensely.

"I don't know," whispered one. "We're all here but Dan."

In a moment footsteps could be heard in the passage. Then a voice:

"Hey—come out and help me. My car got stuck!"

"It's Dan," said Montrose, in a tone of relief.

A man entered the cave. He stopped short, in surprise.