Prosper’s astonished countenance made M. Verduret laugh heartily.

“I risked nine hundred francs,” he continued, “but thread by thread I gathered the whole history of the Clamerans, Gaston’s love-affair, his flight, and the stumbling of the horse ridden by Louis. I found also that about a year ago Louis returned, sold the chateau to a man named Fougeroux, whose wife, Mihonne, had a secret interview with Louis the day of the purchase. I went to see Mihonne. Poor woman! her rascally husband has pounded all the sense out of her; she is almost idiotic. I told her I came from the Clameran family, and she at once related to me everything she knew.”

The apparent simplicity of this mode of investigation confounded Prosper. He wondered it had not occurred to him before.

“From that time,” continued M. Verduret, “the skein began to disentangle; I held the principal thread. I now set about finding out what had become of Gaston. Lafourcade, who is a friend of your father, informed me that he had bought a foundery, and settled in Oloron, where he soon after suddenly died. Thirty-six hours later I was at Oloron.”

“You are certainly indefatigable!” said Prosper.

“No, but I always strike while the iron is hot. At Oloron I met Manuel, who had gone there to make a little visit before returning to Spain. From him I obtained a complete history of Gaston’s life, and all the particulars of his death. Manuel also told me of Louis’s visit; and the inn-keeper described a young workman who was there at the same time, whom I at once recognized as Raoul.”

“But how did you know of all the conversations between the villains?” said Prosper. “You seem to be aware of their secret thoughts.”

“You evidently think I have been drawing upon my imagination. You will soon see to the contrary,” said Verduret good-humoredly. “While I was at work down there, my aids did not sit with their hands tied together. Mutually distrustful, Clameran and Raoul preserved all the letters received from each other. Joseph Dubois copied them, or the important portions of them, and forwarded them to me. Nina spent her time listening at all doors under her supervision, and sent me a faithful report. Finally, I have at the Fauvels another means of investigation which I will reveal to you later.”

“I understand it all now,” murmured Prosper.

“And what have you been doing during my absence, my young friend?” asked M. Verduret; “have you heard any news?”