HE STARTED UP, SHAKEN now with an eerie terror, and raised his hand to hurl the talisman away. But the part of him that had learned with much pain and effort to be civilized made him stop, and think. He sat down again. An instrument of hypnosis? Possibly. And yet that fleeting touch of sight and sound had not been his own, out of his own memories. He was tempted now, fascinated, like a child that plays with fire. The talisman had been worn somehow. Where? On the breast? On the brow? He tried the first, with no result. Then he touched the flat surface of the lens to his forehead. The great tower of stone rose up monstrous to the sky. It was whole, and there were pallid lights within that stirred and flickered, and it was crowned with a shimmering darkness. He lay outside the tower, on