Heym ben-Hillel turned to the others: his eyes had the hurt and puzzled look of a dog that has been kicked for no reason. "But why did he do this?" he asked.

"He just told you," MacLeod replied. "He"s the great Adam Lowiewski.

Checking math for a physics-research team is beneath his dignity. I suppose the Komintern offered him a professorship at Stalin University."

He was watching Lowiewski"s face keenly. "No," he continued. "It was probably the mathematics chair of the Soviet Academy of Sciences."

"But who was this person who could smuggle microfilm out of the reservation?" Suzanne Maillard wanted to know. "Somebody has invented teleportation, then?"

MacLeod shook his head. "It was General Nayland"s chauffeur. It had to be. General Nayland"s car is the only thing that gets out of here without being searched. The car itself is serviced at Army vehicles pool; n.o.body could hide anything in it for a confederate to pick up outside. Nayland is a stuffed shirt of the first stuffing, and a tinpot Hitler to boot, but he is fanatically and incorruptibly patriotic. That leaves the chauffeur. When Nayland"s in the car, n.o.body even sees him; he might as well be a robot steering-device. Old case of Father Brown"s Invisible Man. So, since he had to be the courier, all I did was have Ahmed Abd-el-Rahman shadow him, and at the same time tap our phones.

When he contacted Lowiewski, I knew Lowiewski was our traitor."

Sir Neville Lawton gave a strangling laugh. "Oh, my dear Aunt f.a.n.n.y! And Nayland goes positively crackers on security. He gets goose pimples every time he hears somebody saying "E = mc^{2}", for fear a Komintern spy might hear him. It"s a wonder he hasn"t put the value of Planck"s Constant on the cla.s.sified list. He sets up all these fantastic search rooms and barriers, and then he drives through the gate, honking his b.l.o.o.d.y horn, with his chauffeur"s pockets full of top secrets. Now I"ve seen everything!"

"Not quite everything," MacLeod said. "Kato"s going to put that capsule in another cigarette pack, and he"ll send one of his lab girls to Oppenheimer Village with it, with a message from Lowiewski to the effect that he couldn"t get away. And when this chauffeur takes it out, he"ll run into a Counter Espionage road-block on the way to town. They"ll shoot him, of course, and they"ll probably transfer Nayland to the Mississippi Valley Flood Control Project, where he can"t do any more damage. At least, we"ll have him out of our hair."

"If we have any hair left," Heym ben-Hillel gloomed. "You"ve got Nayland into trouble, but you haven"t got us out of it."

"What do you mean?" Suzanne Maillard demanded. "He"s found the traitor and stopped the leak."

"Yes, but we"re still responsible, as a team, for this betrayal," the Israeli pointed out. "This Nayland is only a symptom of the enmity which politicians and militarists feel toward the Free Scientists, and of their opposition to the research-contract system. Now they have a scandal to use. Our part in stopping the leak will be ignored; the publicity will be about the treason of a Free Scientist."

"That"s right," Sir Neville Lawton agreed. "And that brings up another point. We simply can"t hand this fellow over to the authorities. If we do, we establish a precedent that may wreck the whole system under which we operate."

"Yes: it would be a fine thing if governments start putting Free Scientists on trial and shooting them," Farida Khouroglu supported him.

"In a few years, none of us would be safe."

"But," Suzanne cried, "you are not arguing that this species of an animal be allowed to betray us unpunished?"

"Look," Rudolf von Heldenfeld said. "Let us give him his pistol, and one cartridge, and let him remove himself like a gentleman. He will spare himself the humiliation of trial and execution, and us all the embarra.s.sment of having a fellow scientist pilloried as a traitor."

"Now there"s a typical Prussian suggestion," Lowiewski said.

Kato Sugihara, returning alone, looked around the table. "Did I miss something interesting?" he asked.

"Oh, very," Lowiewski told him. "Your Junker friend thinks I should perform _seppuku_."

Kato nodded quickly. "Excellent idea!" he congratulated von Heldenfeld.

"If he does, he"ll save everybody a lot of trouble. Himself included."

He nodded again. "If he does that, we can protect his reputation, after he"s dead."

"I don"t really see how," Sir Neville objected. "When the Counter Espionage people were brought into this, the thing went out of our control."

"Why, this chauffeur was the spy, as well as the spy-courier," MacLeod said. "The information he transmitted was picked up piecemeal from different indiscreet lab-workers and students attached to our team. Of course, we are investigating, mumble-mumble. Naturally, no one will admit, mumble-mumble. No stone will be left unturned, mumble-mumble.

Disciplinary action, mumble-mumble."

"And I suppose he got that microfilm piecemeal, too?" Lowiewski asked.

"Oh, that?" MacLeod shrugged. "That was planted on him. One of our girls arranged an opportunity for him to steal it from her, after we began to suspect him. Of course, Kato falsified everything he put into that report. As information, it"s worthless."

"Worthless? It"s better than that," Kato grinned. "I"m really sorry the Komintern won"t get it. They"d try some of that stuff out with the big betatron at Smolensk, and a microsecond after they"d throw the switch, Smolensk would look worse than Hiroshima did."

"Well, why would our esteemed colleague commit suicide, just at this time?" Karen Hilquist asked.

"Maybe plutonium poisoning." Farida suggested. "He was doing something in the radiation-lab and got some Pu in him, and of course, shooting"s not as painful as that. So--"

"Oh, my dear!" Suzanne protested. "That but stinks! The great Adam Lowiewski, descending from his pinnacle of pure mathematics, to perform a vulgar experiment? With actual _things_?" The Frenchwoman gave an exaggerated shudder. "Horrors!"

"Besides, if our people began getting radioactive, somebody would be sure to claim we were endangering the safely of the whole establishment, and the national-security clause would be invoked, and some nosy person would put a geiger on the dear departed," Sir Neville added.

"Nervous collapse." Karen said. "According to the laity, all scientists are crazy. Crazy people kill themselves. Adam Lowiewski was a scientist.

Ergo Adam Lowiewski killed himself. Besides, a nervous collapse isn"t instrumentally detectable."

Heym ben-Hillel looked at MacLeod, his eyes troubled.

"But, Dunc; have we the right to put him to death, either by his own hand or by an Army firing squad?" he asked. "Remember he is not only a traitor; he is one of the world"s greatest mathematical minds. Have we a right to destroy that mind?"

Von Heldenfeld shouted, banging his fist on the table: "I don"t care if he"s Gauss and Riemann and Lorenz and Poincare and Minkowski and Whitehead and Einstein, all collapsed into one! The man is a stinking traitor, not only to us, but to all scientists and all sciences! If he doesn"t shoot himself, hand him over to the United States, and let them shoot him! Why do we go on arguing?"

Lowiewski was smiling, now. The panic that had seized him in the hallway below, and the desperation when the cigarette pack had been opened, had left him.

"Now I have a modest proposal, which will solve your difficulties," he said. "I have money, papers, clothing, everything I will need, outside the reservation. Suppose you just let me leave here. Then, if there is any trouble, you can use this fiction about the indiscreet underlings, without the unnecessary embellishment of my suicide--"

Rudolf von Heldenfeld let out an inarticulate roar of fury. For an instant he was beyond words. Then he sprang to his feet.

"Look at him!" he cried. "Look at him, laughing in our faces, for the dupes and fools he thinks we are!" He thrust out his hand toward MacLeod. "Give me the pistol! He won"t shoot himself; I"ll do it for him!"

"It would work, Dunc. Really, it would," Heym ben-Hillel urged.

"No," Karen Hilquist contradicted. "If he left here, everybody would know what had happened, and we"d be accused of protecting him. If he kills himself, we can get things hushed up: dead traitors are good traitors. But if he remains alive, we must disa.s.sociate ourselves from him by handing him over."

"And wreck the prestige of the Team?" Lowiewski asked.

"At least you will not live to see that!" Suzanne retorted.

Heym ben-Hillel put his elbows on the table and his head in his hands.

"Is there no solution to this?" he almost wailed.

"Certainly: an obvious solution," MacLeod said, rising. "Rudolf has just stated it. Only I"m leader of this Team, and there are, of course, jobs a team-leader simply doesn"t delegate." The safety catch of the Beretta clicked a period to his words.

"No!" The word was wrenched almost physically out of Lowiewski. He, too, was on his feet, a sudden desperate fear in his face. "No! You wouldn"t murder me!"

"The term is "execute"," MacLeod corrected. Then his arm swung up, and he shot Adam Lowiewski through the forehead.

For an instant, the Pole remained on his feet. Then his knees buckled, and he fell forward against the table, sliding to the floor.