There were three communicating doors in the apartment--one leading to the passage, one to Mr. Boyd's bedroom, one to a room which had always been kept locked. Against the wall between that room and the office the grand piano was placed, and Dick recollected that in his time a large screen had been there, covering the space now occupied by the back of the piano. Very cautiously and slowly he opened the door of the bedroom. Wrought to a pitch of intense excitement it was not surprising that his hand shook--to such an extent, indeed, had he lost control of himself that the candle dropped to the ground and was extinguished. He was plunged in darkness. In the brief glance he had directed to the bed he fancied he had seen the outline of a sleeping form, and as he knelt to search for the candle he called aloud, "Mr. Boyd!" and trembled at the sound of his voice. "Mr. Boyd! Mr. Boyd!" he called again in louder tones, and his heated fancy created a muffled echo of the name, "Mr. Boyd! Mr. Boyd!" Finding the candle he relighted it, and rising to his feet, slowly approached the bed. A dumb form was there, its back towards him. The bed was in the middle of the room, the head against the wall. Treading very gently he passed to the other side, and bending forward, with the candle in his upstretched hand, he saw a man's face--the face of Samuel Boyd, cold and dead! CHAPTER XXI. THE CHAMBER OF DEATH. He reeled back in horror, but even in that one moment of discovery the necessity of preserving self-control forced itself upon him, and he became calm. The first real step in the mystery was taken, and all his powers of sober reason were needed to consider what would follow, and in what way the dread discovery would affect the beings he held most dear. Fortifying himself with a sip of brandy, and putting into a candlestick the candle he had held in his hand, he turned down the sheets to ascertain how the hard master he had served--the man in whose breast had dwelt no spark of compassion for any living creature--had met his death. There was no blood on the bedclothes, no stab or bullet in the dead man's body. On his face was an expression of suffering, as of one who had died in pain, and his neck was discoloured, as though a hand had tightly pressed it. But this might have been his own act in the agony of the death struggle, and his presence in his bed went far to prove that his end had been a natural one. A closer examination, however, dispelled this theory. The marks on his throat could scarcely have been made by himself, for his arms lay by his side in a natural position. Undoubtedly there had been violence done. By whom?