the rowboat. They'd run aground otherwise. Give me the light. I'll bet we've found where that boat was hidden."
He played the flashlight on the surface of the water and then they could see clearly that the bottom of the cove was broken by a deep channel at that point, several feet in width, leading directly toward a clump of bushes at the shore.
Keeping well to the side of the channel and in the shallow water, the Hardy boys made their way over to the bushes.
Then, when the beam of the flashlight was cast on the dense covert of branches, the mystery was clear.
Beyond the bushes was a dark opening in the rock.
"A cave!" exclaimed Frank, in a suppressed tone.
It was so cleverly concealed that it could not have been seen in the clear light of the day except at close quarters. The glare of the flashlight, however, cast the dark opening into prominence behind the screen of leaves.
This, then, was the explanation of the boat's disappearance. There was a channel in the cove enabling the smugglers to row the boat directly into this cave in the rock. This also probably explained the presence of the motorboat.
"They went in here," said Joe.
