"Then your father was murdered--eh?" exclaimed the elder man.
"Most certainly he was. And that woman is aware of the whole circumstances and of the identity of the assassin."
"How do you know that?"
"By a letter I afterwards opened--one that had been addressed to him at Woodthorpe in his absence. It was anonymous, written in bad English, in an illiterate hand, warning him to 'beware of that woman you know--Mademoiselle of Monte Carlo.' It bore the French stamp and the postmark of Tours."
"I never knew all this," Brock said. "You are quite right, Hugh! The whole affair is a tangled mystery. But the first point we must establish before we commence to investigate is--who is Mademoiselle of Monte Carlo?"