Corriston paused for an instant directly below the glow, measuring the distance from the floor to the aperture with his eyes. He strained his ears again, waiting for the whine to subside. It continued shrill, but suddenly he heard the voice again, heard it above the whine. There was stark terror in the voice. It was despairing and desperate in its pleading, and it seemed to Corriston that he would remember it until he died. He thought he recognized the voice, but he couldn't be sure. It was perhaps merciful that he couldn't, for the grate was at least ten feet above the floor and had he known beyond the faintest shadow of doubt that it was Helen Ramsey's voice, his inability to reach her would have been fiendish torment. He hoped only one thing--that he had to reach that voice in time. First of all he had to stay calm. Even a calm man could not hope to scale a ten-foot wall with his bare hands, but an agitated man would have no chance at all. Something to stand on! A box--anything! A box would help, a ladder would be better. But what were his chances of finding a ladder in the Selector compartment? Not good at all. Still, he could search for a ladder. Quickly now. No time to waste, but don't lose your head. Take thirty seconds, a good long thirty seconds to look around for a metal ladder. There just might be one standing somewhere against the wall. There was! Not one ladder, but two, leaning against the wall directly opposite the glimmering front section of the Selector. It was amazing how desperation could change a man. In the great moments of danger and desperation small, neurotic concerns ceased to matter. He was sure now. He had recognized the voice beyond any possibility of doubt. The ladder scraped against the wall and swayed a little, and for an instant he feared it might slide out from under him. He paused to make sure, and then went swiftly on up until his head was level with the grate. He grasped the heavy grillwork with both hands and raised himself higher. He could see clearly through the grill into the compartment beyond now. The entire compartment was visible from where he stood. It was small and square and dimly lighted by an overhead lamp, and there was a paneled door leading into it. Close to the door a man was standing. Corriston couldn't see his face. He was half-turned away from the wall opposite him, and the girl who was struggling to escape from him was more than two-thirds concealed by his massive shoulders. He was holding her in a tight, merciless grip. He had locked one hand on her wrist and was preventing her from moving either backwards or forwards. It was costing him no effort. He simply stood very straight and still while she struggled vainly to free herself.