M. Gendron looked from one to the other of his companions, who exchanged significant glances. Perhaps he suspected the game they were playing.

"The crime must evidently have been committed as you say," said he.

There was another embarrassing silence. M. Lecoq's obstinate muteness annoyed Plantat, who finally asked him:

"Have you seen all you want to see?"

"All for to-day; I shall need daylight for what remains. I am confident, indeed, that with the exception of one detail that worries me, I have the key to the mystery."

"We must be here, then, early to-morrow morning."

"I will be here at any hour you will name."

"Your search finished, we will go together to Monsieur Domini, at
Corbeil."

"I am quite at your orders."

There was another pause.