Rénine brought down his hand on Dutreuil's shoulder:
"No more talk! Facts! Gaston Dutreuil, you are the only person who on that day knew two essential things: first, that Cousin Guillaume had sixty thousand francs in his house; secondly, that Jacques Aubrieux was not going out. You at once saw your chance. The motor-cycle was available. You slipped out during the performance. You went to Suresnes. You killed Cousin Guillaume. You took the sixty bank-notes and left them at your rooms. And at five o'clock you went back to fetch the ladies."
Dutreuil had listened with an expression at once mocking and flurried, casting an occasional glance at Inspector Morisseau as though to enlist him as a witness:
"The man's mad," it seemed to say. "It's no use being angry with him."
When Rénine had finished, he began to laugh:
"Very funny!... A capital joke!... So it was I whom the neighbours saw going and returning on the motor-cycle?"
"It was you disguised in Jacques Aubrieux's clothes."
"And it was my finger-prints that were found on the bottle in M. Guillaume's pantry?"
"The bottle had been opened by Jacques Aubrieux at lunch, in his own house, and it was you who took it with you to serve as evidence."
"Funnier and funnier!" cried Dutreuil, who had the air of being frankly amused. "Then I contrived the whole affair so that Jacques Aubrieux might be accused of the crime?"