Fuller, this means that that fellow Burnham came with her, and is
close at hand. What in the name----"

But he, too, was interrupted, for a great, gaunt figure flashed like
some weird animal through the window. A long bare arm reached over
Fuller's shoulder and snatched the pistol.

"Yes, Mr. Burnham is with her," said Dennis quietly, as he stood in
front of them, stripped to the waist, the water pouring off him in
streams, and covered them with the revolver.

Hilderman and Fuller von Guernstein held up their hands as requested.

"This is very awkward," said Fuller. "We shall have to let that
wretched Ewart go."

And then Dennis swayed, threw up his arms, and fell sideways, full
length on the floor. Myra glanced at him, and threw herself on her
knees beside the prostrate form.

"Dead!" she screamed. "_Dead!_"

Hilderman pushed her gently aside, and knelt down to examine Dennis.

"It's his heart," he announced. "Come Hugo. We're safe now, and the
girl's blind. Let's get away."

CHAPTER XVIII.

THE TRUTH REVEALED.

I will here resume my own narrative.

When I came to myself I was dazed and aching, but, so far as I could
discover, there were no bones broken. The curious part about it was
the rapidity with which I recalled my fall into the cavern. When I
found I could move my limbs freely I sat up, and discovered that I was
in a small cabin on board a steamer. I stood up and stretched myself.
I was feeling weak and ill, but that would pass off I thought. A
minute's speculation decided me that I was on board the _Fiona_, in
which case I was shanghaied.

I knew that if I valued my life I must act at once. I opened the door
of the cabin, and was surprised to find that it was unlocked. Then I
crept cautiously in the shadows of the dawn up the companion-ladder to
the deck. Though I heard voices I could see no one close to me. I
stole along the deck and listened. The voices were talking quite
freely in German. Where could we be? And, more important still, where
were we going?

I looked around me, and saw that we were steaming slowly down a narrow
loch, surrounded by mountains which stretched right down to the
shores. I looked across the deck and almost shouted out in my
surprise. For there, moving gracefully alongside of us, was a
submarine. There were two officers on the deck of the submarine
chatting with Hilderman and Fuller, who were leaning over the rail of
the _Fiona_. A submarine! A German subm