Frank.

"Oh, just to look about a little," was the reply. "We may be able to
pick up a little useful information."

"And why didn't you tell Von Rosten you were bound there, sir?" Jack
wanted to know.

"Well, for one reason, because I wanted to borrow a part of his crew,"
said Lord Hastings. "Had he known we were headed for Ostend he would
have thought it strange that we didn't wait until we got there to get
more men. Besides, I wouldn't want to try and get men there. It might
prove embarrassing."

"Well, sir," remarked Frank, "that was quite a little story you
concocted for his benefit."

"I flatter myself it wasn't so awfully bad," smiled Lord Hastings. "Of
course, I might have done better if I had been given more time."

"It was pretty good for a quick one," Jack admitted. "But, what are we
going to do with Davis, sir?"

"Turn him over to the British authorities at the first opportunity. He
is deserving of whatever punishment he shall receive. But in the
meantime we must not let him suspect our true identity for he may be of
use to us."

The lads nodded.

"Now," said Lord Hastings, "we may as well put about and run for
Ostend."

Frank gave the command to Edwards, at the wheel, and the U-16 came about
and headed east. Frank and Jack went below to their quarters, leaving
Lord Hastings alone on the bridge.

"There is no use talking," said the latter. "It seems rather peculiar to
be sailing under the German flag."

"And that's no joke," Jack agreed. "I hope we will not have to do it
long."

It was late in the evening when the submarine approached Ostend, where
it was known that the Germans had established a submarine base. The U-16
went along slowly, for Lord Hastings was not certain of his bearings.

Suddenly there came a hail across the water and a light flashed upon the
U-16. In response to a command Lord Hastings brought the vessel to a
halt.

"Who are you?" came the challenge in the darkness.

"U-16, Captain Tarlenhein," Lord Hastings shouted back.

"Good," was the reply. "We wondered what had happened to you. Everything
all right?"

"All right."

"Ready to join us in another desperate mission?"

"Yes. Ready any time."

"Good. Remain where you are. We start within the hour. Your instructions
will be sent to you."

Lord Hastings signified that he understood and the light on the other
vessel was flashed off, leaving the U-16 in darkness again.

"Now what do you suppose is up, sir?" as