nine o’clock
`` Then ... '' `` I am hesitating between two plans , '' said Lupin , who seemed very calm . `` Either to prevent the interview ... '' `` How ? '' `` By forestalling d'Albufex . At nine o'clock , the Growler , the Masher and I climb the ramparts , burst into the fortress , attack the keep , disarm the garrison ... and the thing 's done : Daubrecq is ours . '' `` Unless Sebastiani 's sons fling him through the trapdoor to which the marquis alluded ... '' `` For that reason , '' said Lupin , `` I intend to risk that violent measure only as a last resort and in case my other plan should not be practicable . '' `` What is the other plan ? '' `` To witness the interview .