"To-night?"
"Yes," she said, showing him an article in one of the newspapers. "This is the twenty-fifth; and, according to the information of the police, supplied, they say, by you, there should be a letter delivered in the house on the Boulevard Suchet every tenth day, and the house is to be destroyed by an explosion on the day when the fifth and last letter appears."
Was she defying him? Did she wish to make him understand that, whatever happened, whatever the obstacles, the letters would appear, those mysterious letters prophesied on the list which he had found in the eighth volume of Shakespeare's plays?
He looked at her steadily. She did not flinch. He answered:
"Yes, this is the night. I shall be there. Nothing in the world will prevent me."
She was on the point of replying, but once more controlled her feelings.
That day Don Luis was on his guard. He lunched and dined out and arranged with Mazeroux to have the Place du Palais-Bourbon watched.
Mlle. Levasseur did not leave the house during the afternoon. In the evening Don Luis ordered Mazeroux's men to follow any one who might go out at that time.
At ten o'clock the sergeant joined Don Luis in Hippolyte Fauville's workroom. Deputy Chief Detective Weber and two plain-clothesmen were with him.
Don Luis took Mazeroux aside: