nothing to help himself as the boy
hustled him through the door of the cabin.

There Frank gave Davis a last vigorous shove and he went spinning down
the little hallway.

"There," said Frank, "perhaps that will teach you to stay where you
belong."

He stepped back in the cabin, closed and locked the door. Then he turned
to Jack.

"He's gone," he said quietly.

"I see he has," replied Jack, smiling. "Now, let's get to bed."

But Davis, routed though he had been, still had a few remarks to make.
He tried the knob of the door, and, finding it locked, raised his voice.

"Hey! Let me in there," he demanded.

"You're out; stay out!" said Frank.

"You come out here and I'll punch your face," said Davis.

"Oh, I guess not," replied Frank, feeling quite well pleased with
himself.

"You little Dutchman!" exclaimed Davis.

"Go hunt a hole and go to bed," said Frank.

There was no danger of his getting angry, for he was too amused. "If you
don't," he continued, "I'll come out there and chuck you overboard."

"Oh, you will, will you? Well, come out here and I'll show you."

"Some other time," said Frank cheerfully.

"Right now I am going to turn in. Pleasant dreams to you, Mr. Davis."

Davis was very angry now. Outside the door he stamped his feet one after
the other and rattled the knob vigorously.

"Let me in there, or I'll break this door down," he said fiercely.

During all this conversation Jack had shed his shoes and outer garments
and was about ready for bed. He now decided that the affair had gone far
enough and stepping forward called through the closed door:

"That's enough, Davis. Keep quiet, or I'll take a hand in this myself.
If I do, you'll be sorry. Get away from that door!"

And Davis subsided.

CHAPTER XVI.

AN ENEMY SUNK.

"Steamship off the port bow, sir!"

Frank gave the hail from the bridge. A moment later Lord Hastings
emerged from the little conning tower. For several moments he gazed
searchingly across the water through his glass.

"Britisher," he said finally. "Guess we had better submerge."

"Why, sir?" demanded Frank. "Surely we have nothing to fear from one of
our own vessels."

"You seem to forget about this German flag we carry," said Lord
Hastings; "also, that, so far as we know, there are no British
submarines in these waters."

"That's so, sir. I had forgotten just who we are supposed to be."

"We'll go below," said Lord Hastings.

He moved toward the