rose in volume, and the rain poured furiously from the black skies above.
The storm had broken so suddenly that the Hardy boys were taken aback. Their first impulse was to race for the shelter of the cave, but second thought told them that this would be unwise, for the men in the cave might be aroused by the storm.
"We'd better go back to the boat," said Frank, turning about. "It's liable to be wrecked."
Joe had almost forgotten about their motorboat. It was on the seaward side of the island and the storm was coming in from the sea. Although the boat was partly protected by the little cove into which they had brought it, there was every danger that the storm might cast the craft up on the rocks and wreck it. The consequences, in that case, would be grave. They would be unable to escape from Blacksnake Island at all without giving themselves up to the gang.
The boys turned and fled back across the rocks. Rain streamed down upon them. Thunder crashed. Lightning flickered, illuminating for brief seconds the tossing trees and the tumbled rocks before them.
Joe, during the afternoon, had occupied himself ascertaining the position of the grove and the cave relative to the little bay in which they
