"With the precise object that the miscreant, who is watching all our movements in the dark, may not postpone his crime and may perpetrate it, not at the hour chosen by himself, but at the hour which I have decided upon." "Then we are returning to the manor-house?" "Yes, of course we are, but separately." "In that case, let us go at once." "Listen to me, doctor," said Lupin, in a steady voice, "and let us waste no time in useless words. Above all, we must defeat any attempt to watch us. You will therefore go straight home and not come out again until you are quite certain that you have not been followed. You will then make for the walls of the property, keeping to the left, till you come to the little door of the kitchen-garden. Here is the key. When the church clock strikes eleven, open the door very gently and walk right up to the terrace at the back of the house. The fifth window is badly fastened. You have only to climb over the balcony. As soon as you are inside Mlle. Darcieux's room, bolt the door and don't budge. You quite understand, don't budge, either of you, whatever happens. I have noticed that Mlle. Darcieux leaves her dressing-room window ajar, isn't that so?" "Yes, it's a habit which I taught her." "That's the way they'll come." "And you?" "That's the way I shall come also." "And do you know who the villain is?" Lupin hesitated and then replied: "No, I don't know.... And that is just how we shall find out. But, I implore you, keep cool. Not a word, not a movement, _whatever happens_!" "I promise you." "I want more than that, doctor. You must give me your word of honour." "I give you my word of honour." The doctor went away. Lupin at once climbed a neighbouring mound from which he could see the windows of the first and second floor. Several of them were lighted. He waited for some little time. The lights went out one by one. Then, taking a direction opposite to that in which the doctor had gone, he branched off to the right and skirted the wall until he came to the clump of trees near which he had hidden his motor-cycle on the day before. Eleven o'clock struck. He calculated the time which it would take the doctor to cross the kitchen-garden and make his way into the house. "That's one point scored!" he muttered. "Everything's all right on that side. And now, Lupin to the rescue? The enemy won't be long before he plays his last trump ... and, by all the gods, I must be there!..." He went through the same performance as on the first occasion, pulled down the branch and hoisted himself to the top of the wall, from which he was able to reach the bigger boughs of the tree. Just then he pricked up his ears. He seemed to hear a rustling of dead leaves. And he actually perceived a dark form moving on the level thirty yards away: "Hang it all!" he said to himself. "I'm done: the scoundrel has smelt a rat."