"A-h-h-h!" gasped the startled watcher, pointing in horror. "Wh-h-s-s-ss!" The gruesome apparition uttered a sighing, hissing sound which increased in a weird, half-muffled whistle. Simultaneous with the whistle it darted to the nearest candle, extinguishing it with one whining "Puf-f-f!" With horrid grotesquerie it flapped toward another candle, bent on putting it out. The hood of the voluminous soft black cape which Ronny was wearing was slightly frilled. She had cunningly adjusted it so as to give her masked features an entirely different effect from that of an ordinary domino and mask. A moment's calm inspection would have assured the hazing party that the uncanny visitant was as human as themselves. Her spectacular entrance coupled with the one domino's fear-stricken alarm, had produced upon the hazers the precise effect Ronny had expected to produce. Too greatly startled to take action, a wild, long-drawn, piercing wailing next set in which was not quieting to the nerves. Nor had it ceased when a second eerie voice took it up in a higher key. By the dim flare of the one remaining lighted candle, the flapping, swaying shape and its hideous moaning whistle became invested with fresh dread, augmented as it was by that volume of ear-piercing echoing sound. Suddenly the last candle winked out, leaving the dismayed avengers in Stygian darkness. Their sharp cries and frightened exclamations were summarily drowned, however, by a new pandemonium of blood-curdling shrieks and groans which proceeded from the hall. Through the half open door leading into the hall came a menacing shuffle as of countless approaching feet. It was the final touch needed to demoralize the hazers. Forgetful of the two front windows, they bolted with one accord for the door opening into the hall, as nearly as each could locate it in the dark. Had a real enemy been present the hazers would have run straight into the arms of the hostile force. Their one idea was to get out of the house with all speed. As it was they showed a temerity born of panic. In the midst of the hub-bub, Marjorie had experienced nothing more than a faint stirring of alarm at sight of the bat-like apparition. She knew Ronny instantly, and, guessing her purpose, prudently drew far back into the corner. "Come with me." Marjorie now felt the joy of a familiar arm across her shoulders. "The window. I just opened it. Quick," breathed Ronny. "I'll steer you to it. We must get away before they open the front door. It's locked and they will have their own troubles unlocking it in the dark." In a flash the two had crossed the room to the open window. The moment she had extinguished the last candle Ronny had flitted to the window and raised it under cover of the stampede. Through the fish net which enveloped her Marjorie could see a little, in spite of the shadow cast by the veranda. "Can you use your arms enough through that net to help swing yourself over the sill? It is very low."