here were caverns beyond, dark and forbidding. Did they lead to the outer world? Or, instead, was it not probable that they went to some deep, subterranean dens, from which this monster had learned to come at the priests' summons? Jerry put from his mind all thought of escape in that direction.

"And Marahna, too," he told Winslow. "What will become of her?"

The girl got the essence of the question. Fumbling for phrases that they knew, she made them believe that she was safe. Her people, she told them, would protect her.

"Yes," Jerry agreed. "I guess that's right. She's a princess, you know," he reminded Winslow, "and the great mass of the people look up to her. Only the priests and warrior gangs will be opposed. But how can we get through them?"

The question was unanswered.

"We've got to knock them cold some way," said the inventor. "Got to give them a fright that will last till they let us get through. Once at the big shaft where we came down, we can make our getaway. But how to do it...." His voice died away in dismal thought.

Jerry's eyes were casting about. The priest's robe? No, not good enough. It had brought Winslow through, but it couldn't take them back. Marahna? No help there: she had enough to do to protect herself from the fury of the priests.