He heard the blood singing in his veins. It sometimes seemed so loud that he fancied it prevented his hearing properly certain other sounds that were beginning very faintly to make themselves audible in the depths of the house. Every time he fastened his attention on these sounds, they instantly ceased. They certainly came no nearer. Yet he could not rid himself of the idea that movement was going on somewhere in the lower regions of the house. The drawing-room floor, where the doors had been so strangely closed, seemed too near; the sounds were further off than that. He thought of the great kitchen, with the scurrying black-beetles, and of the dismal little scullery; but, somehow or other, they did not seem to come from there either. Surely they were not _outside_ the house! Then, suddenly, the truth flashed into his mind, and for the space of a minute he felt as if his blood had stopped flowing and turned to ice. The sounds were not downstairs at all; they were _upstairs_--upstairs, somewhere among those horrid gloomy little servants' rooms with their bits of broken furniture, low ceilings, and cramped windows--upstairs where the victim had first been disturbed and stalked to her death. And the moment he discovered where the sounds were, he began to hear them more clearly. It was the sound of feet, moving stealthily along the passage overhead, in and out among the rooms, and past the furniture. He turned quickly to steal a glance at the motionless figure seated beside him, to note whether she had shared his discovery. The faint candle-light coming through the crack in the cupboard door, threw her strongly-marked face into vivid relief against the white of the wall. But it was something else that made him catch his breath and stare again. An extraordinary something had come into her face and seemed to spread over her features like a mask; it smoothed out the deep lines and drew the skin everywhere a little tighter so that the wrinkles disappeared; it brought into the face--with the sole exception of the old eyes--an appearance of youth and almost of childhood. He stared in speechless amazement--amazement that was dangerously near to horror. It was his aunt's face indeed, but it was her face of forty years ago, the vacant innocent face of a girl. He had heard stories of that strange effect of terror which could wipe a human countenance clean of other emotions, obliterating all previous expressions; but he had never realised that it could be literally true, or could mean anything so simply horrible as what he now saw. For the dreadful signature of overmastering fear was written plainly in that utter vacancy of the girlish face beside him; and when, feeling his intense gaze, she turned to look at him, he instinctively closed his eyes tightly to shut out the sight.