From the boulders among which the Hardy boys were standing they could scarcely see the man now, so they emerged and went down toward the cave. Captain Royal, yelling at the top of his lungs, was climbing on up the path.
"What's his idea, anyway?"
Frank shook his head.
"He's certainly running amuck! I hope he doesn't fall and hurt himself."
The path the captain had taken wound about in precarious fashion and at one point crossed a ledge of rock that overhung the beach, immediately over the rocks that sloped down into the deep water.
Captain Royal stumbled and fell, but he got to his feet again and went on.
"If he ever slips when he comes to that ledge, he'll go over the cliff!" Joe declared.
"I wonder if we should follow him."
At that moment, the Hardy boys saw two figures come into view from beyond the rocks. At that distance and through the mist it was impossible to distinguish their features, but as they drew closer the Hardy boys saw that they were none other than Chet and Biff.
"What's going on here?" shouted Chet, as they hastened up.