"To-morrow morning Maud Midharst will think of me as a widower--Maud Midharst, who will one day own that chest, which, when opened, will be found to contain the bones of a thief and a suicide, not the fortune of a great heiress. "To-morrow morning Maud Midharst will think of me as a widower; _what will she think of me as--at night_?" Suddenly the fixed expression left his face. A thought that sent the blood tingling through his veins had rushed in upon him. "Perhaps," he said, breathless, "I am a widower! She may be dead!" He rose nimbly, and, taking up the candle, once more went into the passage leading to the first-floor room of the Tower of Silence. He looked carefully round, and then going to the end of the passage further from the tower, closed the two doors and locked the inner one. He proceeded cautiously back to the door leading into the tower. This was a single door. He held the candle in his left hand, knocked with his right, and bent his ear towards the door. No reply. He knocked again, this time more loudly. Still no reply. Holding the candle behind him, he bent low and looked into the keyhole. Undoubtedly there was the end of the shaft of the key shining against his eye. He paused a while in deep thought; then shaking himself up, knocked more loudly, battering with his clenched fist. No answer. He looked at the candle he carried. It was wax, and in his moving to and fro the wax had overflowed the flame-pan and run down the side, making a long thin ridge. He took a piece of pencil from his pocket, stripped off the ridge of wax, softened the wax at the flame, and stuck a lump the size of a pea on the end of the pencil. Then he heated the free end of the wax, and when it had just begun to run thrust it cautiously into the keyhole, and pressed the wax against the shaft of the key in the lock. He held the pencil steadily thus for a few minutes. With great caution he tried it. All was well. The wax adhered firmly to the end of the pencil and the shaft of the key. With elaborate care he twisted the pencil slightly one way, then the other. The key moved slowly in the lock. He tried it four or five times right and left, and holding the candle behind him and his eye on a level with the keyhole. At last the hole was completely blocked up by the body of the key. Forcing the pencil in firmly, the key slipped through the hole and fell on the floor within. He straightened himself, leaned against the wall for a moment, and wiped his forehead. Then drawing his keys out of his pocket, he inserted one in the lock, turned the lock softly, and entered. As he did so the head of a man disappeared below the window-sill. Grey did not see this head, nor did he at that time know of the man's presence. The room was one of medium size, but it was dark in colour, and the one candle was almost lost in it, and revealed little or nothing. Holding the light above his head Grey peered around.