“The stomach is, in fact, full of food substances; but short of chemical analysis, I find no evidence of poison.

“If the characters of cerebral congestion are well ascertained, we have here, considering the patient’s age, a sufficient cause of death,” observed Desplein, looking at the enormous mass of material.

“Did he sup here?” asked Bianchon.

“No,” said Corentin; “he came here in great haste from the Boulevard, and found his daughter ruined——­”

“That was the poison if he loved his daughter,” said Bianchon.

“What known poison could produce a similar effect?” asked Corentin, clinging to his idea.

“There is but one,” said Desplein, after a careful examination.  “It is a poison found in the Malayan Archipelago, and derived from trees, as yet but little known, of the strychnos family; it is used to poison that dangerous weapon, the Malay kris.—­At least, so it is reported.”

The Police Commissioner presently arrived; Corentin told him his suspicions, and begged him to draw up a report, telling him where and with whom Peyrade had supped, and the causes of the state in which he found Lydie.

Corentin then went to Lydie’s rooms; Desplein and Bianchon had been examining the poor child.  He met them at the door.

“Well, gentlemen?” asked Corentin.

“Place the girl under medical care; unless she recovers her wits when her child is born—­if indeed she should have a child—­she will end her days melancholy-mad.  There is no hope of a cure but in the maternal instinct, if it can be aroused.”

Corentin paid each of the physicians forty francs in gold, and then turned to the Police Commissioner, who had pulled him by the sleeve.

“The medical officer insists on it that death was natural,” said this functionary, “and I can hardly report the case, especially as the dead man was old Canquoelle; he had his finger in too many pies, and we should not be sure whom we might run foul of.  Men like that die to order very often——­”

“And my name is Corentin,” said Corentin in the man’s ear.

The Commissioner started with surprise.

“So just make a note of all this,” Corentin went on; “it will be very useful by and by; send it up only as confidential information.  The crime cannot be proved, and I know that any inquiry would be checked at the very outset.—­But I will catch the criminals some day yet.  I will watch them and take them red-handed.”

The police official bowed to Corentin and left.

“Monsieur,” said Katt.  “Mademoiselle does nothing but dance and sing.  What can I do?”

“Has any change occurred then?”

“She has understood that her father is just dead.”

“Put her into a hackney coach, and simply take her to Charenton; I will write a note to the Commissioner-General of Police to secure her being suitably provided for.—­The daughter in Charenton, the father in a pauper’s grave!” said Corentin—­“Contenson, go and fetch the parish hearse.  And now, Don Carlos Herrera, you and I will fight it out!”