“Yes; a revolver—here it is.”

Powell Seaton held out the weapon, but Halstead shook his head.

“Dr. Cosgrove is the one who’ll want that, since he must stay by Mr. Clodis to-night. And, see here, Mr. Seaton, impress upon the doctor that he mustn’t take a nap, even for a moment. As for you, you’ll want to be watching the house in general.”

“Why, where will you young men be?” inquired Mr. Seaton.

“We couldn’t stay indoors, with our boat gone, sir,” Tom answered. “The first thing we must do is to explore all around the island. Even if we don’t get a sign of the ‘Restless,’ we may find out something else. We may be able to catch someone trying to land on this island later to-night.”

“Yes; it will be best to have guards outside roaming about the island,” admitted Powell Seaton, readily. Then, lowering his voice as he 55 signed to the Motor Boat Club boys to draw closer to him, Mr. Seaton added:

“Something, of some nature, will be attempted to-night. There is no other sound explanation of the crippling of the wireless and the stealing of the boat. So be vigilant, boys—as I shall also be while you’re gone.”

Hank helped himself to a fresh club—a stouter one than that which he had broken over the snubbing post at the dock. Then out into the black night fared the three Motor Boat Club boys.

“Shall we keep together, or spread?” asked Joe Dawson.

“Together,” nodded Tom Halstead. “If there are prowlers about, we can’t tell how soon three of us may be even too few. Remember, we have only firewood to fight with, and we don’t know what kind of men we may run up against.”