"Of all the colossal bluffs that I have ever struck—"
The Comte raised a white hand.
"You are wrong. It is not a bluff. To convince you I will tell you this. My information was obtained from a certain lady. It is she who holds the irrefutable proof that you committed the murder."
"She? Who?"
"Mademoiselle Mirelle."
Derek drew back as though struck.
"Mirelle," he muttered.
The Comte was quick to press what he took to be his advantage.
"A bagatelle of one hundred thousand francs," he said. "I ask no more."
"Eh?" said Derek absently.