‘Well, mister,’ he said, as he put his vehicle in motion, ‘that’s straight enough. I’ll stand by it.’ The bearded man closed and bolted the yard gates and disappeared with his lantern into the house. In a few seconds the sounds of the receding wheels on the gravel ceased and everything was still. After waiting a few minutes motionless, Constable Walker slipped off the coping of the wall and dropped noiselessly to the ground. Tiptoeing across to the hedge, he passed silently out of the little gate and regained the lane. CHAPTER IV A MIDNIGHT INTERVIEW The constable paused in the lane and considered. Up to the present he felt he had done splendidly, and he congratulated himself on his luck. But his next step he did not see clearly at all. Should he find the nearest police station and advise the head constable, or should he telephone, or even go to Scotland Yard? Or more difficult still, should he remain where he was and look-out for fresh developments? He paused irresolutely for some fifteen minutes pondering the situation, and had almost made up his mind to telephone for instructions to his own station, when he heard a footstep slowly approaching along the lane. Anxious to remain unseen, he rapidly regained the small gate in the hedge, passed inside and took up a position behind the trunk of one of the small trees. The sounds grew gradually nearer. Whoever was approaching was doing so exceedingly slowly, and seemed to be coming on tiptoe. The steps passed the place where the constable waited, and he could make out dimly the form of what seemed to be a man of medium height. In a few seconds they stopped, and then returned slowly past the constable, finally coming to a stand close by the little gate. It was intensely still, and the constable could hear the unknown yawning and softly clearing his throat. The last trace of light had gone from the sky and the stars were showing brightly. There was no wind but a sharpness began to creep into the air. At intervals came the disconnected sounds of night, the bark of a dog, the rustle of some small animal in the grass, the rush of a motor passing on the high road. The constable’s problem was settled for him for the moment. He could not move while the other watcher remained. He gave a gentle little shiver and settled down to wait. He began reckoning the time. It must, he thought, be about half-past eight o’clock. It was about eight when the dray had turned into the drive and he was sure half an hour at least must have passed since then. He had leave until ten and he did not want to be late without authority, though surely, under the circumstances, an excuse would be made for him. He began to picture the scene if he were late, the cold anger of the sergeant, the threat to report him, then his explanation, the sudden change of manner. . . .