“What’s the meaning of this?” demanded the latter angrily.
“The meaning is that you are our prisoner,” replied Jack quietly. “Turn her about, Frank,” he added, “and we’ll go back to the submarine.”
“Submarine!” exclaimed the German. “Oh, I see, you are British.”
“You bet we are,” replied Frank.
The German grew silent, and Jack, who was watching him carefully even as he rowed, noticed that he was fumbling in his breast pocket.
“Watch him, Frank,” he cried. “Don’t let him throw anything overboard.”
Frank leaned forward and pressed the muzzle of his automatic against the German’s breast.
“No tricks,” he said quietly, “or you are a dead man.”
The German’s hand dropped to his side.
The lads rowed back to the submarine quickly. Frank jumped aboard first and Jack waited until the German had followed him before he climbed up and drew the little boat up after him. Then all went below, Frank keeping his weapon on the German as they descended.