“My dear sir,” he answered in his dictatorial tone, “if they are not arrested it is because no one is aware that they have committed a murder.”

This reasoning did not appear to convince Grivet, and Camille came to his assistance.

“I am of the opinion of M. Grivet,” said he, with silly importance. “I should like to believe that the police do their duty, and that I never brush against a murderer on the pavement.”

Olivier considered this remark a personal attack.

“Certainly the police do their duty,” he exclaimed in a vexed tone. “Still we cannot do what is impossible. There are wretches who have studied crime at Satan’s own school; they would escape the Divinity Himself. Isn’t that so, father?”

“Yes, yes,” confirmed old Michaud. “Thus, while I was at Vernon—you perhaps remember the incident, Madame Raquin—a wagoner was murdered on the highway. The corpse was found cut in pieces, at the bottom of a ditch. The authorities were never able to lay hands on the culprit. He is perhaps still living at this hour. Maybe he is our neighbour, and perhaps M. Grivet will meet him on his way home.”

Grivet turned pale as a sheet. He dared not look round. He fancied the murderer of the wagoner was behind him. But for that matter, he was delighted to feel afraid.

“Well, no,” he faltered, hardly knowing what he said, “well, no, I cannot believe that. But I also have a story: once upon a time a servant was put in prison for stealing a silver spoon and fork belonging to her master and mistress. Two months afterwards, while a tree was being felled, the knife and fork were discovered in the nest of a magpie. It was the magpie who was the thief. The servant was released. You see that the guilty are always punished.”

Grivet triumphed. Olivier sneered.

“Then, they put the magpie in prison,” said he.