der quickly, followed by the others. They now
found themselves in what might be termed the main room of the
submarine. Beyond were several other compartments, including one where
was located much of the machinery which ran the undersea boat.

"It's a good deal like being downstairs on a small warship," declared
Fred. "See, there are staterooms and messrooms and everything else!"

"Well, I suppose they have to give the crew some comforts, they take
such long, disagreeable trips," remarked Jack.

The three cadets wandered around in the interior of the submarine for
over a quarter of an hour. They saw where a number of repairs were
being made to the side of the U-boat and also to some of the
machinery, and they also saw where some stores had been taken on
board, boxes and barrels of various kinds.

"I guess they are stocking up for another cruise," remarked Gif.

"It must be quite a job to get all that stuff to this out-of-the-way
place," said Jack.

"Yes, and to do it so secretly, too," added Fred.

"I think I see a way of making this boat stay here for a while, at
least," remarked Jack. "It will be an easy matter to put some of that
delicate machinery forward out of commission."

"Come on and do it!" cried his cousin quickly.

The three cadets were inspecting the machinery and wondering how they
could damage it effectively with the least possible trouble, when
there came a sudden interruption.

"What are you doing here?" came in a guttural German voice. "Hands up,
or I will shoot you!" And, turning quickly, the three cadets found
themselves confronted by a burly German, holding in each hand a
pistol.

CHAPTER XXVIII

THE CABIN IN THE WOODS

It was a comparatively easy matter for the twins and Spouter to get
out of the cavern by the way they had entered. It was, however, not so
easy for them to climb up the face of the cliff fronting that portion
of Barlight Bay.

"Some climb, believe me!" panted Spouter, when they had reached a spot
where going was easier.

"I came pretty near slipping and breaking my neck at one point," said
Randy. "I don't believe those Germans ever use that entrance, do you?"

"Not very often," answered his twin.

The three cadets had reached the woods at a point which was new to
them, being almost a mile from the other cliff, where they had had the
outing with the girls. Between the two points there was a split in the
land, and here the waters from the bay dashed in over