He watched, with the lights out, until the strip of light under the outer door of his suite turned black as the corridor lights were switched off; and then he waited half an hour longer before he set to work on the lock. He realized that it was not outside the realms of probability that the same thoroughness which had caused those minute electric contacts to be fitted to the windows might have provided some similar system of alarms on the door; but that was a risk which had to be taken, and possibly several glasses of Ivar Nordsten's excellent port on top of twelve hours' enforced passivity had made him a trifle light-headed. Every now and then he stopped, motionless, without even breathing, and listened for any whisper of sound that might betray a guard prowling around the passages; but he could hear nothing. And at last he was able to turn the handle noiselessly and slip out into the silent darkness of the house.
A tentative needle of light skimmed away from the Saint's hand, dabbed at the floor and walls, and vanished again. It came from the masked bulb of a tiny pocket torch which was another semi-burglarious instrument that he had brought with him. And thereafter, with only that one brief glimpse of the route ahead to refresh his memory, he disappeared into the blackness like a roving ghost.
His objective, in so far as he had an objective at all, was the library where cocktails had been served before dinner. If there were any intriguing developments to be unearthed in that house, the library seemed the obvious place to begin a search for them; and he had always been a sublime optimist.
He reached the head of the staircase and stopped there to listen. A pale blue glimmer of light came through the studio window on the stairway and achieved little more than taking the harsh deadness off the dark for half a flight. A faint musty smell touched the Saint's sensitive nostrils; and he stood for a moment breathing it silently, like a wild animal, with an invisible frown creasing his forehead. But the associations of it eluded him, and with a slight shrug he set one foot stealthily on the first downward step.
As he did so he heard the scratching.
It was a queer soft noise, like some very light-footed thing with nailed shoes pacing across a parquet floor. It seemed to take one or two steps, while he listened with his heart beating a shade faster; then it stopped; then it came again. And then the silence came down once more.
Simon remained motionless, a mere patch of shadow in the dark, so still that he could feel the blood pounding steadily in his veins. It came to him, with great clarity, that there were healthier places for him to be abroad at midnight than the house of Ivar Nordsten. He had a momentary vision of the very comfortable bed that was already turned down for him in the very comfortable bedroom to which he had been assigned, and wondered what on earth could have made him impervious to its very obvious enticement. But the scratching sound was not repeated; and at length, with a wry grin, he went on. He wouldn't stand much chance of completing his tour of investigation, he reflected ruefully, if a mouse could scare him so easily. . . .
At last he stepped down on the floor of the hall. An infinitesimal glimmer of the light from the stairway window still reached there--enough to take him to the library door without the use of his torch. Very gently he turned the handle; and as he did so he heard the scratching again.
In a flash he had whipped round and shot the pencil beam of his torch towards it. Even as he did so, he realized that his nerves had got the better of him, but the impulse was too strong for reason. And as he turned, his right hand leapt to the automatic at his hip with a grim feeling that if by any chance the scratching had a human origin it would relieve him considerably to discover it.
The dimmed beam gave too feeble a light to show him any details. He saw nothing but a black shadow which filled one far corner, and a pair of eyes that caught the light and held it in two steady yellowish reflections as large as walnuts; and one of the happiest moments of his life began when he had got through the library door and shut it behind him.
Breathing a trifle deeply, he fished a cigarette out of his pocket and lighted it, keeping his flashlight switched on. If complete disaster had been the price, he couldn't have denied his nerves that time-honoured consolation. Whatever the black shadow with the yellow eyes might be, he felt that his system could stand a snifter of tobacco and an interval of thoughtful repose before looking at it again. Meanwhile he was on the sanctuary side of the library door, and he was stubbornly resolved to make the most of it. His torch showed him that the curtains were drawn, and with a reckless movement of his hand he switched on the lights and turned to a survey of the room.
Only the immutable law of averages can account for what followed. If a man looks for things often enough, it is reasonable to assume that at some time or other he must stumble on the right hiding place at the first attempt; and the Saint had searched for things often enough in his life, even if on that occasion he didn't know what he was looking for.
The toe of one bare foot was kicking meditatively at the edge of the carpet. The corner rolled over. His thoughts ran, more or less: "Nothing important would be left out for any inquisitive servant to get hold of. There isn't a safe. It might be a dummy bookcase, like I've got. But excavations are also possible. . . ."
Somehow he found himself looking down at a trapdoor cut in the oak planking of the floor.
It lifted easily. Underneath was a hinged stone slab with an iron ringbolt, smooth and unrusted. Without hesitation he took hold of it and lifted. It required all his strength to raise the slab, but he managed it.
He looked down into black darkness; but from the bottom of the darkness came a faint sound of shuffling movement. With a creepy tingle working across his scalp, he picked up his torch again and sent the beam down the shaft.
Ten feet below him, a face looked up with dull staring eyes that blinked painfully even in the faint ray of his flashlight. There was something hideously familiar about it, as if it were the blanched wreck of a face which he ought to know. And in another second his blood ran cold as he realized that it was the face of Ivar Nordsten.
VII
The face was not quite the same. The nose was less dominant, the complexion had a yellow tinge which the financier's did not have, the eyes lacked the faded brightness which Nordsten's possessed; but it was recognizable. It had given the Saint such a shock that he found it difficult to speak naturally.
"Hullo, sunshine," he said at length. "And who are you?"
The man's mouth worked hungrily, like an animal's.
"All right," he said, in a curiously stiff hoarse whisper, as if he had half forgotten how to use his voice. "I'm used to it now. You can't make me suffer any more."
"Who are you?" Simon repeated.
"I'm you," said the man huskily. "I know now. I've thought it all out. I'm you--Nordsten!"
The Saint's nerves were steady enough now. Somehow, that last shock had been a homoeopathic dose, wiping out everything else; he was left with the dizzy certainty that the trail had turned into a stranger course than anything he had dreamed of, and with a grim curiosity to find out where it led.
"I'm here to help you, you fathead," he said. "Tell uncle what it's all about."