Two."

Harrison came out of a side room where he had been examining the circuits leading to the Ambassador's suite. Methodically he checked his pressure gauges, set the controls and looked at Cercy. "Now?" he asked.

"Now." Cercy watched the screen. The Ambassador was still typing.

Suddenly, as Harrison sent home the switch, the room was engulfed in flames. Fire blasted out of concealed holes in the walls, poured from the ceiling and floor.

In a moment, the room was like the inside of a blast furnace.

Cercy let it burn for two minutes, then motioned Harrison to cut the switch. They stared at the roasted room.

They were looking, hopefully, for a charred corpse.

But the Ambassador reappeared beside his desk, looking ruefully at the charred typewriter. He was completely unsinged.

"Could you get me another typewriter?" he asked, looking directly at one of the hidden projectors. "I'm setting down a philosophy for you ungrateful wretches."

He seated himself in the wreckage of an armchair. In a moment, he was apparently asleep.

ll right, everyone grab a seat," Cercy said. "Time for a council of war."

Malley straddled a chair backward. Harrison lighted a pipe as he sat down, slowly puffing it into life.

"Now, then," Cercy said. "The Government has dropped this squarely in our laps. We have to kill the Ambassador—obviously. I've been put in charge." Cercy grinned with regret. "Probably because no one higher up wants the responsibility of failure. And I've selected you three as my staff. We can have anything we want, any assistance or advice we need. All right. Any ideas?"

"How about Plan Three?" Harrison asked.

"We'll get to that," Cercy said. "But I don't believe it's going to work."

"I don't either," Darrig agreed. "We don't even know the nature of his defense."

"That's the first order of business. Malley, take all our data so far, and get someone to feed it into the Derichman Analyzer. You know the stuff we want. What properties has X, if X can do thus and thus?"

"Right," Malley said. He left, muttering something about the ascendancy of the physical sciences.

"Harrison," Cercy asked, "is Plan Three set up?"

"Sure."

"Give it a try."

While Harrison was making his last adjustments, Cercy watched Darrig. The plump little physicist was staring thoughtfully into space, muttering to himself. Cercy hoped he would come up with something. He was expecting great things of Darrig.

Knowing the impossibility of working with great numbers of people, Cercy had picked his staff with care. Quality was what he wanted.

With that in mind, he had chosen Harrison first. The stocky, sour-faced engineer had a reputation for being able to build anything, given half an idea of how it worked.

Cercy had selected Malley, the psychiatrist, because he wasn't sure that killing the Ambassador was going to be a purely physical problem.

Darrig was a mathematical physicist, but his restless, curious mind had come up with some interesting theories in other fields. He was the only one of the four who was really interested in the Ambassador as an intellectual problem.

"He's like Metal Old Man," Darrig said finally.

"What's that?"

"Haven't you ever heard the story of Metal Old Man? Well, he was a monster covered with black metal armor. He was met by Monster-Slayer, an Apache culture hero. Monster-Slayer, after many attempts, finally killed Metal Old Man."

"How did he do it?"

"Shot him in the armpit. He didn't have any armor there."

"Fine," Cercy grinned. "Ask our Ambassador to raise his arm."

"All set!" Harrison called.

"Fine. Go."

In the Ambassador's room, an invisible spray of gamma rays silently began to flood the room with deadly radiation.

But