get him." Houston nodded slowly. "Okay. Can you give me all the data you have so far?" Reinhardt patted a heavy folder on his desk. "It's all here." Then he tapped the projected map on the screen. "That's the Lasser Building—Church Street at Worth. Somewhere in there is the man we're looking for." David Houston spent the next six weeks gathering facts, trying to determine the identity of the mysterious Controller at Lasser & Sons. Slowly, the evidence began to pile up. At the same time, he worried over his own problem. Who was betraying non-criminal Controllers to the PD Police? In that six-week period, two more men and a woman were arrested—one in Spain, one in India, and one in Hawaii. There weren't very many Controllers on Earth, percentagewise. Of the three and a half billion people on Earth, less than an estimated one-thousandth of one percent were telepathic. But that made a grand total of some thirty-five thousand people. Spread, as they were, all over the planet, it was rare that one Controller ever met another. The intelligent ones didn't use their power; they remained concealed, even from each other. But someone, somewhere, was finding them and betraying them to the Psychodeviant Police. As more and more data came in on the Lasser case, Houston began to get an idea. If there were a really clever, highly intelligent, megalomaniac Controller, wouldn't it be part of his psychological pattern to attempt to get rid of the majority of Controllers, those who simply wanted to lead normal lives? And, if so, wasn't it possible that both his cases—the official and the unofficial—might lead to the same place: Lasser & Sons? It began to look as though Houston could kill both his birds at once, if he could just figure out when, how, and in what direction to throw the stone. In the middle of the seventh week, a Controller in Manchester, England, was mobbed and torn to bits by an irate crowd before the PD Police could get to him. There was no doubt in Houston's mind that this one was a real megalomaniac; he had taken over another man's brain and forced him to commit suicide. The controlled man had taken a Webley automatic, put it to his temple, and blown his brains out.