“That’s right!”

“I am going to signal to them and find out!” exclaimed Fred; and without waiting for the others to reply, the young lieutenant dashed over the rocks and through the brushwood in the direction of the bay shore. As he did this he took out his handkerchief and waved it wildly, at the same time calling at the top of his lungs.

The motor boat, a long, rakish-looking craft, was cruising quite close to the shore, and presently some of those on board noticed Fred’s call for aid. The motor of the craft was shut off, and the boat drifted up to the shore.

“What do you want?” demanded one of the men on board, sharply.

“We want help, and we want it right away!” declared Fred. And then he added as he got a better view of those aboard the boat: “Are you United States officers?”

“What do you want to know that for?” was the counter question.

“Well, if you are, we want your help, and want it right away.”

“Why? Have you discovered anything unusual?” demanded one of the officers on the boat, and his manner showed his intense interest.

“We certainly have! And more than that, we have made a prisoner—a German.”

“You don’t mean it!” said one of the other men aboard the motor boat, and then looked more sharply at Fred than ever. “We’ll have to investigate this,” he added to his companions.