“So much the better. I mean to ‘wig-wag’ the fleet with it and tell them the fix we are in.”

“Say, Ned,” cried Herc enthusiastically, “you ought to be a judge or a lawyer or an inventor or something.”

“Thanks. I’d rather be a sailor.”

Ned pulled out his handkerchief and began wig-wagging with it. A sentry on duty in front of the cells, which were open-fronted to admit cool air, looked at him in surprise, but said nothing.

About that time the officer of the deck on the Manhattan happened to have his official spy-glass leveled at the rock. He saw the signal that Ned was so frantically waving and summoned a signalman.

“Signalman! Somebody is wig-wagging us from the rock. Take the glasses and see what they want.”

“Aye, aye, sir!”

It was not long before Ned had conveyed by his ingenious plan a clear idea of their predicament to those on the flag-ship. Captain Dunham was informed of the matter.

“Those lads in trouble again!” he exclaimed.

“Yes, sir; but it was not their fault. The British are very touchy about their rock and suspect everybody of being spies. I guess that’s how it happened.”