America. I shall make public your personal attitude in the matter. At
the present all I demand is release and that manuscript on the table
beside you. Also my notebook." He bowed slightly and stood waiting as
though he fully expected the officers to do his bidding, as indeed he
did.

"Will you explain your notes?" asked Gustav quietly.

Otto was nervously biting his small moustache, his eyes fixed on
Evelyn's lovely face.

"No! No!" cried the Professor loudly, "a thousand times no! I refuse
to share with you the results of my researches. What, and have you get
the credit of all my labor? Never!" He clenched his hands.

"Father --" began Evelyn pleadingly.

"Be silent, Evelyn!" commanded her father sternly. "I know what I am
about! I refuse to say anything, whatever happens."

"You had better think this over, Professor," said Gustav. "We will
leave you here alone for half an hour. Talk it over with your children
and decide if you wish to give up your life for the sake of these
notes. Explain them to us, and we will promise you safe conduct out of
the country. The girl and boy will have to remain as guarantee of your
good faith. They will not he harmed. In case you will not do as we
suggest --" He tapped his saber, and started to the door.

Otto spoke abruptly.