"As it chances," said the Dutch officer sternly, "I happen to be the
brother of Herr Block, so I know you are not he. You are under arrest,
sir."

"For what?" demanded Hal.

"For traveling under false passports, sir. You friends are under
arrest also. You shall be sent to Amsterdam under guard. And you told
me you were Dutch subjects!"

"No I didn't," said Hal. "I told you we carried Dutch passports, and so
we do."

"It amounts to the same thing. It seems I have broken Dutch neutrality
to help a batch of spies. You are all under arrest."

He summoned Captain Hodden to take charge of the four friends.

"You will be responsible for them," Colonel Block said.

The captain saluted and marched his prisoners away. They were put in a
tent some distance away and a guard stationed over them. They were not
searched.

"Well," said Hal, "we're out of Germany, but, it seems to be a case of
out of the frying-pan into the fire."

"They can't shoot us as spies," declared Stubbs. "Holland is not at
war and we have not been active against her."