"But," said Maître Detinan, placing himself in front of the table, "Mlle. Gerbois is not here yet."

"Well?"

"Well, isn't her presence indispensable?"

"I see, I see! Arsène Lupin inspires only a partial confidence. He pockets his half-million, without restoring the hostage. Ah, my dear maître, I am sadly misunderstood! Because fate has obliged me to perform acts of a rather ... special character, doubts are cast upon my good faith ... mine! I, a man all scruples and delicacy!... However, my dear maître, if you're afraid, open your window and call out. There are quite a dozen detectives in the street."

"Do you think so?"

Arsène Lupin raised the blind:

"I doubt if M. Gerbois is capable of throwing Ganimard off the scent.... What did I tell you? There he is, the dear old chap!"

"Impossible!" cried the professor. "I swear to you, though...."

"That you have not betrayed me?... I don't doubt it, but the fellows are clever. Look, there's Folenfant!... And Gréaume!... And Dieuzy!... All my best pals, what?"

Maître Detinan looked at him in surprise. What calmness! He was laughing with a happy laugh, as though he were amusing himself at some child's game, with no danger threatening him.