But here again he seemed to himself the prey of his own fancies. He asked himself angrily if he was losing his memory and his grip of facts. He thought that he had left only two of the pictures in pieces; now three of them were without their backs. As he sat looking at them, the clock on the mantelpiece all at once ceased ticking, and this small thing again, due solely to his omission to wind the clock, had an effect upon his mood. He seemed to hear the sudden silence, as it were the ceasing of a heart-beat, and the "all is over" of the bereaved when the last breath passes. He rose and stretched himself and yawned, and took in with him to his bed-room one of the pots of violets, so that, if he scented violets, he should know whence the scent came. And he took care to turn on the light in his bed-room before turning off all the other lights. Could this be David, the man who used to sleep beneath the stars? Now he lay down in the dark, and all was quiet. Only, from far away, from some other polygon in the hive of flats, came a tinkling, the genteel sound of the piano, very faint, as remote from him as was the life of her who played it. He was listening to it, thinking of the isolation in which all souls are more or less doomed to live, when the question occurred to him incidentally: "Am I really alone in this flat? As a matter of fact, is not some one with me?" He had seemed to hear a definite click, and if it was not in the flat, then, he thought, his ears must be losing their old trick of exactness. He stole out of bed, and, without making the faintest sound, peeped out along the corridors. Nothing seemed to stir. Minute after minute he stood patiently, hearing only that shell-music which the tympanum of the ear gives out in deep silence. Once he caught a Lilliputian rush, and a screech, an escapade in mouseland. Behind him a small clock ticked in his bed-room, and presently there was yet another sound, low, but prolonged, as if paper was being very cautiously torn somewhere. Instantly the instinct to grip his six-shooter in his hand rose in David. His former experience in the flat had caused him to have the weapon ready. Great is that moment when awe rises into indignation and action, as now with him. Silently, with every nerve strung, and each muscle nimble for the encounter, he stepped backward into his bed-room, and drew the weapon from beneath his pillow. No longer careful about hiding the fact that he was awake, he made a rush along the longer corridor into the hall, caught up the hall chair and table and threw them against the door, heaved up the hat-stand and placed it also against the door, thus blocking the enemy's retreat. And he said to himself: "Be it ghost, or be it mortal man, let there be a fight to a finish this time!"