There was a sharp click. He started and looked up. A tiny line of light appeared in the ceiling, widened, and then became an oblong spilling radiance on the central table below, but leaving the rest of the room dark. He realized that the mirror he'd noticed had been slid out of the way. He couldn't see much of the room above except some microfilm files and part of a TV reading machine of the sort that could use micro-libraries all over America. No human figures were visible from where he stood and he felt no desire to step forward into the revealing light. He wondered, with a certain incredulous pride, whether he was so dangerous a type that they intended to fish for him with nets. Just then a foot was dangled over the oblong's edge. It was a charming foot, slim and clad in the most shimmeringly expensive sort of digital stocking, which gave each toe its separate translucent compartment. Running back from between the toes were four black velvet thongs, which helped attach the airy black shoe and gave it an exciting though spidery appearance. The foot was joined to a narrow ankle and gently swelling calf which hardly needed the stocking's glamorizing. That was all of the figure he could see at the moment, but the moment didn't last long. The foot was followed by a second and shortly by all the rest of the girl. She hung briefly, facing away from him. He got a quick impression of a short black evening frock; a black shoulder cape; long, dark hair cascading free and white arms in black gloves that began above the elbows and ended at the knuckles. His foot, shifting on the foam carpeting, made a tiny noise. Instantly she whirled on him like a black panther, complete even to the shrill snarl. As she did, Phil was rocked by two surprises: the first, revealed when her short cape spun out, that her evening frock was off the bosom, a style he had thought and read about a great deal, but that was not followed at his social level; the second, and far more attention getting, that the fingers of her right hand were tipped with clawed, silver thimbles, while in her left she held ten gleaming inches of that most disturbing anachronism, a knife. Poised like a fencer, she waggled it rapidly under his chin. "Did my father set you to spy on me?" she demanded. The "set" and "spy" were sheer hiss. "No," he replied chokingly, not wanting his Adam's apple to protrude. "Then why are you here," she demanded, advancing the knife a bit, "lurking in the dark?" "Your father locked me in," he protested, leaning backward. "Ishtar! Is he doing that to his patients, too?" she commented. Her accents were a bit incredulous, but she did drop the knife to an easy, on guard position, which also caused her cape to fall around her modestly. "Locked me in and turned off the lights," Phil reaffirmed. She slitted her long-lashed eyes thoughtfully. "I can almost believe the first part of that," she said. "He often sends his patients in here for observation." "Observation?"