M. Lecoq gazed intently at his companion, and simply said:

"Ah!"

But this is what he thought: "At last I am going to find out where the manuscript which we heard read the other night, and which is in two handwritings, came from."

After a moment's hesitation, M. Plantat went on:

"I have put my life in your hands, Monsieur Lecoq; I can, of course, confide my honor to you. I know you. I know that, happen what may—"

"I shall keep my mouth shut, on my honor."

"Very well. The day that I caught Tremorel at the mayor's, I wished to verify the suspicions I had, and so I broke the seal of Sauvresy's package of papers."

"And you did not use them?"

"I was dismayed at my abuse of confidence. Besides, had I the right to deprive poor Sauvresy, who was dying in order to avenge himself, of his vengeance?"

"But you gave the papers to Madame de Tremorel?"