can. Please precede me; and you too," this last to Davis
in a gruffer tone.

All proceeded below, where eight or ten other men stood waiting. Then
all marched away.

Reaching the water front all entered a small boat and were rowed toward
a submarine, perhaps a quarter of a mile away.

As they passed, Jack noticed the U-6 a short distance away and made out
Lord Hastings' figure on the bridge. He raised an arm and waved it. He
was not sure that his signal had been seen, but he did not wish to draw
further attention to his commander.

Aboard the submarine the German commander had them taken to his own
cabin, where he insisted upon his own surgeon dressing Frank's wound and
having a look at Jack's arm.

The surgeon pronounced both injuries slight and prescribed rest. Several
times Frank caught the German commander looking at him curiously and it
worried him somewhat, for there was something familiar about the man,
though Frank could not seem to place him.

"I'm just trying to think," said the German to Frank, "where I have seen
you before. I don't place your name."

"I can't remember you, sir," replied Frank.

Suddenly the German slapped his thigh. Frank's heart sank for some
reason he was unable to explain to himself.

"I have it!" exclaimed the German. "You are the lad whom I captured from
a British submarine in the Kiel Canal not so long ago. I remember you
well now. You escaped. So you are a British spy, eh?"

"I--I----" began Frank.

The German raised a hand.

"It will do you no good to deny it," he said quietly. "I cannot be
mistaken. Besides, I can plainly see now that you are no German; and
this supposed-to-be German officer with you is also British. I can see
it now. So is the other prisoner, though I cannot see what you should
have been fighting about."

Neither Frank nor Jack replied. Each realized that there was no use in
entering a denial.

"I'll take my oath I'm sorry for this," said the German. "Of course, you
know there is but one thing I can do?"

Frank nodded understandingly.

"You were found within our lines in German uniforms," said the
commander. "Therefore you are spies and must be treated as such. I
myself shall call a court martial within the hour. You must be shot. The
other man will be tried separately, but I have no doubt he will suffer
the same fate. Orderly!"

A second officer entered the room.

"Have these prisoners closely guarded and bring them here an hour from
now,