“I think we may come to some harm. He fairly enticed us in here and now he’s playing with us as a cat does with a mouse. I’m going to stop and go back to the entrance.”
“Well, perhaps you’re right,” admitted Andy, and it was quite an admission for him, as he was always willing to take more risks than was his brother. “We’ll stand still a few minutes and see what happens.”
They remained there, quiet in the darkness. For a time not a sound broke the stillness. Then, with startling suddenness came a hail:
“Well, why don’t you catch me?”
“Catch me?” repeated the echoes, and there followed a mocking laugh.
“Here he is!” cried Andy. “Off to the left.”
“No, the right,” insisted Frank. “Over this way.”
“All right,” agreed Andy, and he followed his brother.
Hardly had he spoken than there rang throughout the cave a dull, booming sound. It seemed to shake the ground.
“He’s exploded something!” cried Frank, coming to a halt. He flashed his electric torch around, but could see nothing. He and his brother were in a low, rock-roofed passage.