"Now, where have you boys been? Did those men take you away? Where did they take you? Did you escape? How did you escape?"

This rapid-fire succession of questions was hurled by Cub at Hal and Bud as they approached the place where Mr. Baker was quizzing his prisoner under the protection of the boy sentinel against a surprise attack from the prisoner's friends. Some of these questions were encouraged by nods and smiles of assent to preceding interrogatories.

"Yes, yes, but one question at a time," Hal replied. "You're on the right track, Cub, but that isn't the way to get our story out of us. I see you have one of the rascals a prisoner. Keep him. He's the worst of the bunch."

The "rascal" winced at the characterization.

"Who are they, anyway," asked Cub. "What are they doing here? Do they own this island?"

"Now, you've added three more questions," Hal remarked with a smile, for he was much pleased at the opportunity to tease the tall and usually super-wise youth in something of the latter's characteristic manner. "We can't answer all your questions, Cub, but we know there's a mystery about this fellow and his friends, and I suppose we'll have to wait for your father's mathematics to solve it."

"Was it those four men who made prisoners of you?" inquired Cub, who, in his eagerness to get some definite information, resolved to ask one question at a time and pursue his inquiry in an orderly manner.

"Yes," Hal replied.

"They grabbed me first while I was down at the landing," put in Bud, who was almost as impatient to tell the story as Cub was to hear it. "I went down there when I saw a rowboat pulling up and didn't recognize the men in it until they came ashore. I thought they were still on the island, for when they left us a few hours before, they didn't go toward the landing, and we didn't see them go toward it since then. I hollered when they grabbed me, and Hal came rushing to see what was the matter."

"Yes, and then I ran back to the radio table and telegraphed to Max Handy at Rockport," added Hal, taking up the narrative at this point and indicating a disposition to volunteer details more readily. "While I was still in the act of sending, two of the them appeared and seized me. They took me into their rowboat with Bud at the landing and rowed to a yacht almost a duplicate of Mr. Perry's. We were confined in the cabin until after dark and then put ashore on an island half a mile from here. That was the last we saw of them."