Turning towards Monsieur Darzac, Rouletabille cried: "You know the
truth! Tell us, then, if that is not how things happened."

"I don't know anything about it," replied Monsieur Darzac.

"I admire you for your silence," said Rouletabille, "but if
Mademoiselle Stangerson knew of your danger, she would release you
from your oath. She would beg of you to tell all she has confided
to you. She would be here to defend you!"

Monsieur Darzac made no movement, nor uttered a word. He looked
at Rouletabille sadly.

"However," said the young reporter, "since Mademoiselle is not here,
I must do it myself. But, believe me, Monsieur Darzac, the only
means to save Mademoiselle Stangerson and restore her to her reason,
is to secure your acquittal."

"What is this secret motive that compels Mademoiselle Stangerson to
hide her knowledge from her father?" asked the President.

"That, Monsieur, I do not know," said Rouletabille. "It is no
business of mine."

The President, turning to Monsieur Darzac, endeavoured to induce
him to tell what he knew.

"Do you still refuse, Monsieur, to tell us how you employed your
time during the attempts on the life of Mademoiselle Stangerson?"