“Yes, sir,” returned Frank. “Out in the ice-boat.”
“Good, healthy sport. Have a good time?”
“Oh, yes. We went away down as far as Cabin Island.”
“Cabin Island, eh? That’s strange. I’ve had Cabin Island in my mind for the past hour or more. There has been a message here, waiting for you.”
“A message?”
Mr. Hardy reached into his desk and produced an envelope.
“A man called here this afternoon and left this message for you boys.”
“But why should it remind you of Cabin Island, Dad?” asked Joe.
“Because the man who left the message here was Elroy Jefferson’s chauffeur.”
“Elroy Jefferson!” exclaimed Frank. “Why, he is the man who owns Cabin Island.”