They stopped in the fish store on their way to the depot. There they found Bob, busily engaged in putting up clams, and other products of the sea, for customers. Andy remarked to the captain that he thought he had a new clue to the mysterious man.
“And that reminds me, that I meant to ask you where he would likely be heading for when he drove us back,” put in Frank.
“Where was he?” inquired the old seaman, and the brothers described the location.
“By Neptune!” suddenly exclaimed the captain. “I shouldn’t wonder but what he was going to Cliff Island!”
“Cliff Island!” cried Frank.
“Yes, you know that group of rocks—it’s not much more than ten miles from the Shark’s Teeth.”
“Sure we know where it is,” agreed Andy. “But no one lives on it. It’s as desolate as a volcano.”
“All the better for what that man wanted,” declared the captain. “Take my word for it he’s gone there with the damaged motor boat, though why I can’t say. But he wants to be let alone, and that’s the best place he could pick out for the purpose. Why don’t you go there?”
“I believe we will!” cried Frank. “We didn’t know just how to begin the search, but that’s the best clue yet.”
“On to Cliff Island!” cried Andy.