Venner hesitated for a moment; it would be just as well, he thought, to err on the side of caution. A casual glance from the corridor disclosed nothing, except that on the table there stood a bottle apparently containing wine, for a glass of some dark ruby liquid stood beside it. Very rapidly Venner ran down the flight of stairs and looked into the room. "There is nobody there for the moment," he said, "but that bulldog of Fenwick's can't be far off, for there is a half-smoked cigarette on the end of the table which has not yet gone out. I think I can see my way now to working this thing without any trouble or danger. Do you happen to know if that rheumatic old caretaker uses snuff?" "Really, I don't," Vera said with a smile. "But what possible connection is there between the caretaker and his snuff--?" "Never mind about that at present. Go down and ask the old man for his snuff box. By the look of him, I am quite sure he indulges in the habit. Tell him you want to kill some insects in the conservatory. Tell him anything, so long as you get possession of the box for a few minutes." Vera flew off on her errand. She was some moments before she could make the old man understand what she needed; then, with the air of one who parts with some treasure, he handed over to her a little tortoiseshell box, remarking, at the same time, that he had had it for the last sixty years and would not part with it for anything. A moment later, Vera was back again at the end of the corridor. Venner had not moved, a sure sign that no one had approached in the meantime. Taking the box from Vera's hand, and leaving her to guard the corridor, he stepped into the little room, where he proceeded to stir a little pellet of snuff into the glass of wine. This done, he immediately hurried Vera away to the other end of the corridor. "I think that will be all right now," he said. "We have only got to wait till our man comes back and give him a quarter of an hour. Snuff is a very strong drug, and within a few minutes of his finishing his wine he will be sound asleep on the floor." It all fell out exactly as Venner had prophesied. The man came back presently, passing Vera and her companion without the slightest suspicion of anything being wrong. Then he turned into the little room and closed the door behind him. Half an hour passed before Vera knocked at the door on some frivolous pretext, but no answer came from the other side. She knocked again and again, after which she ventured to open the door. The wine-glass was empty, a half-finished cigarette smouldered on the floor, and, by the side of it, lay the man in a deep and comatose sleep. Venner fairly turned him over with his foot, but the slumbering form gave no sign. The thing was safe now.