A thrill of fear went through the two boys.
One of the men approached the back of the car. Frank gripped his revolver firmly.
CHAPTER XVII
The Cave
In a moment the lid of the locker would have been raised.
Then came an interruption.
"The boss wants us," said one of the men.
The man approaching the back of the car halted.
"All right," he growled. "We'll leave this."