Eleanor stevens appeared from the hall. "Verrick, this isn't Keith Pellig. Get Moore down here and make him talk. He's trying to injure Benteley; they had a fight."

Verrick's eyes widened. "This is Benteley? That god­damn Moore has no sense; this'll foul up things."

Benteley was beginning to recover some sanity. "Can this be fixed?" he muttered.

"He was out cold," Eleanor said in clipped tones. She had pulled on her slacks and sandals and had thrown a coat over her shoulders. "Get one of the lab doctors in here."

Moore appeared, shaken and afraid. "There's no harm done. I jumped the gun a little, that's all."

Benteley retreated from Moore and examined his alien hands and face. "Verrick," his voice said, thin and empty, "help me."

Verrick said gruffly: "It'll be all right. Here's the doctor now."

Herb Moore fluttered a few paces away, afraid to come near Verrick. At the desk Eleanor wearily lit a cigarette and stood smoking as the doctor inserted a needle into Benteley's arm and squashed the bulb. As darkness sur­rounded him, Benteley heard Verrick's heavy voice:

"You should have killed him or let him alone; not this kind of stuff. You think he's going to forget?"

A long way off Eleanor Stevens was talking.

"You know, Reese doesn't really understand what Pellig is. Have you noticed that?"

"He doesn't understand any kind of theory." Moore's reply was sullen and resentful.

"Why should he, when he can hire bright young men to understand it for him?"

"I suppose you mean me."

"Why are you with Reese? You don't like him. You don't get along with him."

"He has money to invest in my kind of work. Look, I took MacMillan's papers, all that research he did on robots. What came of his work? Just witless hulks, glorified vacuum cleaners, dumb-waiters. All he wanted was some­thing big and strong to lift things, so that the labouring classes could lie down and sleep. MacMillan was pro-humanity."

There was the sound of people stirring, getting up and walking, the clink of a glass.

"The mix-up was your fault."

"Benteley will keep. He'll be there for good old Keith Pellig."

"You're not going to go over the implementation, not in your condition."

Moore's voice was full of outrage. "He's mine, isn't he?"

"He belongs to the world," Eleanor replied icily. "You're so wrapped up in your chess games that you can't see the danger you're putting us in. Every hour gives that fanatic a better chance of survival. If you hadn't gone berserk Cartwright might already be dead."

It was evening.

Benteley stirred. He sat up, surprised to find himself strong and clear-headed. The room was in semi-darkness. A single light gleamed, a glowing dot that he identified as Eleanor's cigarette. Moore sat beside her, moody and remote. Eleanor stood up quickly and turned on a table lamp.

"What time is it?" Benteley asked.

"Eight-thirty." She came to the bed, hands in her pockets. "How are you feeling?"

He swung his legs shakily to the floor. They had wrapped him in a standard nightrobe; his clothes were no- where in sight. "I'm hungry," he said. Suddenly he clenched his fists and struck wildly at his face.

"It's you," Eleanor said.

Benteley's legs wobbled under him. "I'm glad of that. It really happened?"

"It happened. It'll happen again, too. But next time you'll be prepared. You, and twenty-three other bright young men."

"Where are my clothes? I'm getting out of here."

Moore got up quickly. "You can't walk out. You dis­covered what Pellig is—do you think Verrick would turn you loose?"

"You're violating the Challenge rules." Benteley found his clothes in a cupboard and spread them out on the bed. "You can send only one assassin at a time. This thing of yours is rigged up to look like one, but——" Benteley unfastened his nightrobe and tossed it away. "This Pellig is nothing but a synthetic. He's a vehicle, you're going to slam a dozen high-grade minds into and head it for Batavia. Cartwright will be dead, you'll incinerate the Pellig-thing, and nobody'll know. You'll pay off your minds and send them back to their work. Like me."

Moore was amused. "I wish we could do that. As a matter of fact, we gave it a try. We jammed three per­sonalities into Pellig at once. The result was chaos. Each took off in a different direction."

"Has Pellig any personality of his own?" Benteley asked, as he dressed. "What happens when all the minds are out of him?"

"He becomes what we call vegetable. He doesn't die, but he devolves to a primitive level of existence, a kind of twilight sleep."

"What kept him going last night at the party?"

"A bureaucrat from my lab. Pellig is a good medium: not too much distortion or refraction."

"When I was in it, I thought Pellig was there with me."

"I felt the same way," Eleanor agreed calmly. "The first time I tried it I thought there was a snake in my slacks. It's an illusion. When did you first feel it?"

"When I looked in the mirror."

"How do you think I felt? I don't think Moore should try women operators."

Moore resumed: "During the last few months we've tried dozens of people. Most of them crack. A couple of hours and they get a weird sort of claustrophobia. They want to get away, as Eleanor says, as if it's something slimy and dirty close to them." He shrugged. "I don't feel that way. I think he's beautiful."

"How many have you got?" Benteley asked.

"We've found a couple of dozen who can stand it. Your friend Davis is one. He has the right personality: placid, calm, easy-going."

Benteley tightened. "So this explains his new classifica­tion?"

"Everybody goes up a notch for this. You're in on it, according to Verrick. It's not as risky as it sounds. If something goes wrong, if they start popping at Pellig, who­ever's in there at the moment will be withdrawn."

"So that's the method?" Benteley said, half to himself.

"Let's see them prove a Challenge violation," Moore said spiritedly. "There's nothing they can get us on. The law specifies one assassin at a time, chosen by public con­vention. Keith Pellig was chosen by public Convention, and there won't be more than one of him."

"I don't see what purpose it serves."

"You will," Eleanor said. "Moore has a long story that goes with it."

"After I've eaten," Benteley stipulated.

They walked slowly to the dining-room. There Benteley froze at the doorway; Pellig was sitting at Verrick's table, a glass of water at his bloodless lips.

"What's wrong?" Eleanor asked.

"Who's in it?"

Eleanor shrugged indifferently. "One of the lab tech­nicians. We keep somebody in it all the time; the more familiar we are with it the better chance we'll have."

Benteley moved towards the far end, away from Pellig. The waxen pallor made him uncomfortable; it was like that of some insect newly out of its shell, not yet hardened by the sun.

And then it came back to him.

"Listen!" he cried huskily. "There's something more."

Moore and Eleanor Stevens glanced sharply at each other.

"The flying! I left the ground." His voice rose fear­fully. "Something happened to me. On and on, like a ghost. Until the fireplace." He rubbed his forehead, but there was no bump, no scar.

Of course not. It was another body.

"Explain," he demanded hoarsely, "what happened to me."

"Something to do with the lighter weight," Moore said. "The body's more efficient than a natural human body."

Benteley's face must have showed disbelief because Eleanor put in: "Pellig may have accepted a drug-cocktail before you entered the body."

Verrick's gruff voice interrupted them.

"Listen," he said to Benteley, "you said you wanted to know our strategy; here it is. Once a telepath locks minds with an assassin he has him. The Corps never lets the assassin break off. They know exactly what he's going to do as soon as he thinks of it. No scheming can work; he's analysed too frequently."