"Let's get out of here first. They may come back at any minute."
Frank raised the lid cautiously. The blackness without was as utter and complete as the darkness within. He could see nothing.
He listened for a moment, thinking possibly some of the gang had remained behind, but he heard nothing. Quickly, he got out of the locker and leaped to the ground. Joe followed. They closed the lid.
"Boy! I thought it was all up with us," whispered Joe. "When he came over to open the locker my heart was thumping so loudly I was sure he could hear it."
"Me, too. Well, we can thank their boss—whoever he is. I wonder what kind of place we're in, anyway."
Frank switched on his flashlight.
By its brilliant gleam, he saw that they were in a rocky passageway, a large tunnel evidently in the bluffs along Barmet Bay. It was wide enough to accommodate the roadster, but did not offer a great deal of leeway on either side. It appeared to be a natural tunnel, although there was evidence that human toil had been responsible for widening it and clearing it out.
Frank stepped forward and cast the ray of light before him.
It revealed a blank wall of rock. Then, as he
