thing of the past. But as the old killers moved out, new ones took their place. Look at the half-dozen NVI plagues we've had in the past few years—neurotoxic virus infections that started to appear out of nowhere twenty years ago. Look at the alky-sikys you see in every bar today, a completely new type of alcoholism-psychosis that we haven't even been able to describe, much less cure. Look at the statistics on mental disease, rising in geometric progression almost every year."

The tall doctor stood up and walked to the window. "We don't know why it's happening, but it is. Something's on the march, something ghastly and evil among the people. Something that has to be stopped." He gave the cards a sharp riffle and tossed them onto the desk with a sigh. "We can't stop it until we know something about the human brain and how it works, and why it does what it does, and how. We don't even understand fully the structure of the nervous system, much less understand its function. And we've learned all we can from cats and dogs and monkeys. Any further study of a monkey's brain will give us great insight into the neuroses and complexes of monkeys, no doubt. But it won't teach us anything more about men." His voice was very soft. "You can see where this leads, I think."

Jeff Meyer nodded slowly. "You need men," he said.

"We need men. Men to study. Cruel as it may sound, men to experiment upon. We can't learn any more from any other variety of ... experimental animal. But there are problems. Toy around with a man's brain and he is likely to die, quite abruptly. Or he may be deranged, or he may go violently insane. Most of the work, however well planned, however certain we were of results, however safe it appeared, proved to be completely unpredictable. Much of the work and many of the results were quite horrible. But we're making progress, slow—but progress nonetheless. So the work continues.

"It hasn't been very popular. No man in his right mind would volunteer for such a job. So we hired men. For the most truly altruistic work in the world, our workers come with the most mercenary of motives: we pay for their services and we pay well. A hundred thousand dollars is a small fee, on our scale. We have the government behind us. The sky is the limit, if we need a man for a job. The money is paid, when the work is completed, either to the man himself or to his heirs. You see why the name they've given themselves is so curious—Medical Mercenaries, the 'Mercy Men.' That's why a man must be desperate to come to us. That's why we must be so very careful who joins us, for what motives."

Jeff Meyer stared at his hands and waited in the silence of the room. His eyes strayed once again to the curious cards, and the chill of fear went through him like a ghastly breeze. This was a port of last resort, a road that could end in horror and death. Ted Bahr had said it wasn't worth it—that Conroe would never escape alive—but he knew that Conroe could. And he knew Conroe well enough to know that he would.

Jeff felt the old bitterness and hatred swell up in his mind, and his hands trembled as he sat. He had long since thrown aside his life as he had known it, cast off the veneer of civilized life that he had acquired, to hunt Paul Conroe down and kill him. There was nothing else in his life that mattered. It had been a long, grueling hunt, tracking him, following him, studying him, tracing his movements and habits, plotting trap after trap, driving the man to desperation. But there had been no indication, anywhere along the line, that Conroe would turn to such a desperate gamble as this.

But he must have known that death otherwise was inevitable. Here he could be changed. He might disappear from the face of the Earth in the oblivion of quiet death, to be sure, but he also might emerge, unscathed, to live in wealth the rest of his life, unrecognizable and safe.

Jeff Meyer looked up at the doctor and his eyes were hard. "I haven't changed my mind," he said. "What has to be done to join?"

Dr. Schiml sighed, and turned resignedly to the file panel. "There are tests that are necessary and rules to be obeyed. You'll be confined and regimented. And once you're assigned to a job and sign a release, you're in." He leaned forward and punched the visiphone button. Tapping his fingers idly on the desk, he waited until an image blinked and cleared on the screen. "Blackie," he said tiredly. "Better send the Nasty Frenchman up here. We've got a new recruit."

The visiphone snapped off and Jeff sat frozen to his seat, his pulse throbbing in his neck, every nerve in his body screaming in excitement. The face on the screen had been clearly visible for a moment: a pale face with large gray eyes—a woman's face, surrounded by flowing black hair. It was a face that was impressed indelibly on his memory. It belonged to the girl who had danced the night before in the red light.

CHAPTER THREE

There was no doubt of it. She was the girl in the night club, the dancing girl with the flowing black hair and the mask-like smile, who had led him to Conroe and then brought the spotlight to his face to spring the trap too soon. Frantically Jeff fought to control his excitement. He knew his face was white and he avoided the doctor's puzzled glance. But he couldn't control the angry fire burning in his mind, the little voice screaming out: "He's here; he's here, somewhere!"

But why was she here? The doctor had called her "Blackie." He had spoken to her with familiarity. Jeff's mind whirled. He had the strangest feeling that he had missed something somewhere along the line, that he knew the answer but couldn't quite grasp it. What could the girl's sudden appearance in the Center involve?

Or had her appearance at the night club been the unusual one?

A buzzer rang and the office door opened to admit a small, weasel-faced man. The doctor looked up and smiled. "Hello, Jacques. This is Jeff Meyer, the new recruit. Take him down and get him quartered in, all right? And you might brief him a little. He's awfully green."

The little man scratched his long nose and regarded Jeff with a nasty smile. "A new one, huh? Where are you going to line him up?"

"No telling. We'll see where the tests put him, first. Then we'll talk about jobs."

The smile widened on the little man's face, turning down the end of his long pointed nose and revealing a dirty yellow row of teeth. His eyes ran over Jeff from head to toe. "Big one too. But then, they fall just as hard as the rest. Want me to take him right down?"

Schiml nodded. "Maybe he can still get lunch." His eyes shifted to Jeff. "This is the Nasty Frenchman," he said, motioning toward the little man with his thumb. "He's been around for a long time; he can show you the ropes. And don't let him bother you too much—his sense of humor, I mean. Like I say, he's been around here a long time. You'll get quarters and you'll be expected to stay with your group for meals and everything else. That means no contacts outside the hospital as long as you're here. You'll get the daily news reports, and there are magazines and books in the library. If you've got other business outside, you haven't any business in here. Any time you leave the Center it's considered an automatic breach of contract."

He paused for a long moment and gave Jeff a strange look, almost a half smile. "And you'll find that questions aren't appreciated around here, Jeff. Any kind of questions. The men don't like people too much when they ask questions."

The Nasty Frenchman shuffled his feet nervously, and Jeff started out the door. Then the little man turned back to Dr. Schiml. "They brought Tinker back from the table about ten minutes ago. He's in pretty bad shape. Maybe you should look at him?"

"This was the big job today, wasn't it?" Schiml's eyes were sharp. "What did Dr. Bartel say?"

"He said no dice. It was a bust."

"I see. Well, it may be just the diodrax wearing off now, but I'll be