“And suppose they don’t let you into the house, monsieur le marquis?”

“Why shouldn’t they?”

“The house in the Square Lamartine is occupied by Prasville’s men.”

“Don’t worry, Sébastiani. I shall get in. If they don’t open the door, there’s always the window. And, if the window won’t open, I shall arrange with one of Prasville’s men. It’s a question of money, that’s all. And, thank goodness, I shan’t be short of that, henceforth! Good-night, Daubrecq.”

He went out, accompanied by Sébastiani, and the heavy door closed after them.

Lupin at once effected his retreat, in accordance with a plan which he had worked out during this scene.

The plan was simple enough: to scramble, by means of his rope, to the bottom of the cliff, take his friends with him, jump into the motor-car and attack d’Albufex and Sébastiani on the deserted road that leads to Aumale Station. There could be no doubt about the issue of the contest. With d’Albufex and Sébastiani prisoners; it would be an easy matter to make one of them speak. D’Albufex had shown him how to set about it; and Clarisse Mergy would be inflexible where it was a question of saving her son.

He took the rope with which he had provided himself and groped about to find a jagged piece of rock round which to pass it, so as to leave two equal lengths hanging, by which he could let himself down. But, when he found what he wanted, instead of acting swiftly—for the business was urgent—he stood motionless, thinking. His scheme failed to satisfy him at the last moment.

“It’s absurd, what I’m proposing,” he said to himself. “Absurd and illogical. How can I tell that d’Albufex and Sébastiani will not escape me? How can I even tell that, once they are in my power, they will speak? No, I shall stay. There are better things to try . . . much better things. It’s not those two I must be at, but Daubrecq. He’s done for; he has not a kick left in him. If he has told the marquis his secret, there is no reason why he shouldn’t tell it to Clarisse and me, when we employ the same methods. That’s settled! We’ll kidnap the Daubrecq bird.” And he continued, “Besides, what do I risk? If the scheme miscarries, Clarisse and I will rush off to Paris and, together with Prasville, organize a careful watch in the Square Lamartine to prevent d’Albufex from benefiting by Daubrecq’s revelations. The great thing is for Prasville to be warned of the danger. He shall be.”

The church-clock in a neighbouring village struck twelve. That gave Lupin six or seven hours to put his new plan into execution. He set to work forthwith.