"A couple of men are coming!" he cried.
"It's my dad and Professor Lemm!" broke out Slugger. "Now you fellows will catch it!"
"Be on your guard, everybody!" sang out Jack to his cousins, and each of them caught up his gun and waited.
A few minutes later, Professor Lemm and Mr. Brown appeared in front of the cabin. Their arms were full of camp supplies. Evidently, this place had been a rendezvous for the entire Brown party for several days. It was from here that Slugger and Nappy had gone up to the other end of the island to spy upon Uncle Barney.
"What is the meaning of this?" demanded Mr. Brown, when he found himself confronted by the Rovers.
"It means that we have made your son and Nappy Martell prisoners," explained Jack calmly.
"Prisoners!"
"Yes. And I think more than likely we'll have to hand them over to the authorities."
"I don't understand this at all," put in Asa Lemm, and his voice trembled a little.
Mr. Powell had now come up, and the Rovers told him who the men were. He at once took charge of matters.