out without thinking what he did.

Gustav drew the book back.

"It has a suspicious look," he said. "So many plans and measurements
and specifications. Will you not explain?"

The Professor reddened. He shut his mouth stubbornly.

"Those are private notes," be said. "I was sent over here to make what
discoveries I could along certain lines."

"What, did I tell you, Gustav?" broke in Otto, turning to his brother
officer and speaking in a low tone. "There is the whole thing! He was
a spy sent to make discoveries along 'certain lines.' He confesses
that. He has succeeded in doing so. The book tells us that."

"Wait, wait!" begged Gustav. "Professor Morris, do you understand that
you are here facing a most serious charge?"

"It is a silly, trumped up charge," declared the Professor, irritably.
"Silly trumped up charge! I absolutely will not answer your
questions. Wait until you hear from the American Consul."

"We won't hear from him," said Gustav gently. "You are in our hands,
bearing suspicious documents, and you refuse to answer our questions.
Do you realize the seriousness of this affair?"

"Certainly not!" declared the Professor, "and let me tell you, my young
friend, I shall write this thing up in the papers when I return to