"The most complete confidence, as you know."

"Very well, then: trust to my care. This very evening I will prepare a
draught for you to take to-morrow morning, and I will even now fix the
duration of this terrible malady which frightens you so much. In two
days I shall fetch Edouard from his school to celebrate the beginning of
your convalescence, and we will start, at latest, on February 1st. You
are astonished at what I say, but you shall see if I am not a good
doctor, and much cleverer than many who pass for such merely because the
have obtained a diploma."

"Then, doctor, I will place myself in your hands."

"Remember what I say. You will leave this on February 1st."

"To begin this cure, can you ensure my sleeping to-night?"

"Certainly. I will go now, and send my wife to you. She will bring a
draught, which you must promise to take."

"I will exactly follow your prescriptions. Goodnight, my friend."

"Good-night, madame; and take courage"; and bowing low, he left the room.

The rest of the evening was spent in preparing the fatal medicine. The
next morning, an hour or two after Madame de Lamotte had swallowed it,
the maid who had given it to her came and told Derues the invalid was
sleeping very heavily and snoring, and asked if she ought to be awoke.
He went into the room, and, opening the curtains, approached the bed. He
listened for some time, and recognised that the supposed snoring was