"And suddenly it flashed across Joan's mind, with a passion of fear to which all that had gone before was as nothing, that Darby was coming up that ladder to that light! Darby, whom he had thought so safe, was to come unknowing, unwarned, to that straining, panting beast. He turned faint for a moment. And then with all the power of his soul he tried to scream. He felt his throat strain and bend and all but burst with the tremendous effort. He tried again, and the pain blinded him. At his feet there the girl strained and twisted, great tears rolling down her cheeks. And yet there was a ghastly silence. The stifled panting of that hound echoed in a deadly quiet. It was horrible, pitiful! The girl's white gown was torn and mussed; her soft naked shoulder quivered when she strained against the cruel sash. He could see that her arm was red where it was tied. "She trembled and bent and bit her lip till the blood stained her chin. He cursed and prayed and shrieked till the sound, had it come, would have deafened him--but it was all a ghastly mockery! It was as still as a quiet summer afternoon--and the dog and the man waited at the window. "There was a sound of scraping. Someone was coming up the ladder--someone who whistled softly under his breath, and came nearer every moment. Up, up--the ladder rattled against the window-frame. The man at the window slipped his hand slowly, slowly from the dog's muzzle. The dog stiffened and drew back his black, dripping jaws from his yellow teeth. The man's fingers sunk in the beast's wrinkled neck and he held him back, while he threw one look of hate and triumph at the tortured woman behind him. "The man bound to the bed couldn't bear it any longer. As a hand grasped the window-sill from outside, he summoned all his iron will, and with a rasping, rending effort that brought a sickly, warm taste to his mouth, he gave a hoarse cry. "Then the woman leaned over till the sash sunk into her soft flesh, and shrieked with a high, shrill note that cut the air like a knife. But even as she shrieked, a form rose over the sill, there was a rush from inside, and their voices were drowned in a cry of terror, a scream so broken and despairing that Joan could not recognise the voice. And then there was a horrid crashing fall, and the light went out, and something snapped in the brain of the man chained to the bed, and he dropped for miles into a deep, black gulf." * * * * * There was a dead silence in the room. No one dared to speak. The stranger's voice had quavered and broken, and in a hoarse whisper he said, rising and stumbling to the door while they made way for him silently: