"This is the place!" Frank Hardy excitedly told the officer in charge of the party. "The tunnel is right behind those bushes."
"Mighty well hidden," the trooper commented. "Do you think you can find the other opening?"
"It's farther down the beach."
"I think I could find it," volunteered Joe.
"Take three of these men and watch that part of the beach, at any rate." The trooper detailed three men to accompany Joe. "I'll wait until I see your flashlight signal," he said. "When you find the place where they drive the cars out, turn the light on and off. Then wait for my whistle."
Joe and the men with him hurried on down the beach. The others waited in silence near the entrance to the tunnel.
Eventually they saw the blinking light that plainly told them that the outer passage was guarded.
"Fine," said the trooper. He raised the whistle to his lips. "All ready, men?"
"All set," answered one of the constables, in a low voice.
The shrill blast of the whistle sounded through the night. With one accord, the men leaped forward, plunged into the bushes, and crowded into the tunnel. Their flashlights made the dark passage as bright as day.