-faced that the
government officers would hardly listen to them. Both they and the
Germans were searched and all their weapons were taken from them. Then
the prisoners were handcuffed together, and the officers made a
thorough search of the cabin, picking up everything it contained of
value. One took charge of the documents found and also the money which
had been passed over to Mr. Brown.

"A fine piece of business for a so-called American to be in!" said the
head Secret Service man to Brown and Martell sternly. "I wouldn't be
in your shoes for a billion dollars."

"It's--it's--all a mistake. I'll--er--explain everything later," said
Slogwell Brown weakly.

As for Nelson Martell, he was on the verge of a collapse, and had to
be supported when all left the cabin.

In the meanwhile other interesting happenings were taking place in
the vicinity of the wrecked submarine. There a number of Secret
Service men and other officers of the law under the leadership of Mr.
Blarcomb, did what they could to round up all those connected with the
U-boat. There was something of a running fight, and quite a few shots
were exchanged. In this fight two of the Germans were seriously
wounded, and one of the Secret Service men got a bullet through his
shoulder. But in the end all of the enemy were captured, and then the
authorities took charge of the disabled submarine, and also the
underground workshop, where the Germans had been laboring so hard to
get their undersea boat once more into shape to sail.

It was after midnight before all these happenings came to an end and
the evildoers had either been placed in jail or under a strong
military guard. The capture, of course, was kept as secret as possible
by the government officials.

"And to think that the fathers of Nappy Martell and Slugger Brown are
guilty!" cried Ruth Stevenson, when Jack met her later on and told her
some of the particulars. "Isn't it dreadful? What will they do with
them?"

"Most likely they will be interned for the period of the war, and
maybe they will get regular jail sentences," answered the young
captain.

"And what will they do with Nappy and Slugger?"

"Oh, they will probably be interned also."

After the men at the cabin in the forest and the Germans from the
wrecked submarine had been rounded up, Jed Kessler was called in, and
without hesitation he recognized two of the men he had seen at the
ammunition plant just before the explosion occurred. One