The cell had been put together more efficiently than any Korvin had ever been in. But that was only natural, he told himself sadly; the Tr’en were an efficient people. All the preliminary reports had agreed on that; their efficiency, as a matter of fact, was what had made Korvin’s arrival a necessity. They were well into the atomic era, and were on the verge of developing space travel. Before long they’d be settling the other planets of their system, and then the nearer stars. Faster-than-light travel couldn’t be far away, for the magnificently efficient physical scientists of the Tr’en--and that would mean, in the ordinary course of events, an invitation to join the Comity of Planets.

An invitation, the Comity was sure, which the Tr’en would not accept.

Korvin stretched out on the cell’s single bunk, a rigid affair which was hardly meant for comfort, and sighed. He’d had three days of isolation, with nothing to do but explore the resources of his own mind. He’d tried some of the ancient Rhine experiments, but that was no good; he still didn’t show any particular psi talents. He couldn’t unlock the cell door with his unaided mind; he couldn’t even alter the probability of a single dust-mote’s Brownian path through the somewhat smelly air. Nor could he disappear from his cell and appear, as if by magic, several miles away near the slightly-damaged hulk of his ship, to the wonder and amazement of his Tr’en captors.

He could do, as a matter of fact, precisely nothing. He wished quietly that the Tr’en had seen fit to give him a pack of cards, or a book, or even a folder of tourist pictures. The Wonders of Tr’en, according to all the advance reports, were likely to be pretty boring, but they’d have been better than nothing.

In any decently-run jail, he told himself with indignation, there would at least have been other prisoners to talk to. But on Tr’en Korvin was all alone.

True, every night the guards came in and gave him a concentrated lesson in the local language, but Korvin failed to get much pleasure out of that, being unconscious at the time. But now he was equipped to discuss almost anything from philosophy to plumbing, but there was nobody to discuss it with. He changed position on the bunk and stared at the walls. The Tr’en were efficient; there weren’t even any imperfections in the smooth surface to distract him.

He wasn’t tired and he wasn’t hungry; his captors had left him with a full stock of food concentrates.

But he was almightily bored, and about ready to tell anything to anyone, just for the chance at a little conversation.

As he reached this dismal conclusion, the cell door opened. Korvin got up off the bunk in a hurry and spun around to face his visitor.

The Tr’en was tall, and slightly green.

He looked, as all the Tr’en did, vaguely humanoid--that is, if you don’t bother to examine him closely. Life in the universe appeared to be rigidly limited to humanoid types on oxygen planets; Korvin didn’t know why, and neither did anybody else. There were a lot of theories, but none that accounted for all the facts satisfactorily. Korvin really didn’t care about it; it was none of his business.

The Tr’en regarded him narrowly through catlike pupils. “You are Korvin,” he said.

It was a ritual, Korvin had learned. “You are of the Tr’en,” he replied. The green being nodded.

“I am Didyak of the Tr’en,” he said. Amenities over with, he relaxed slightly--but no more than slightly--and came into the cell, closing the door behind him. Korvin thought of jumping the Tr’en, but decided quickly against it. He was a captive, and it was unwise to assume that his captors had no more resources than the ones he saw: a small translucent pistollike affair in a holster at the Tr’en’s side, and a small knife in a sheath at the belt. Those Korvin could deal with; but there might be almost anything else hidden and ready to fire on him.

“What do you want with me?” Korvin said. The Tr’en speech--apparently there was only one language on the planet--was stiff and slightly awkward, but easily enough learned under drug hypnosis; it was the most rigorously logical construction of its kind Korvin had ever come across. It reminded him of some of the mathematical metalanguages he’d dealt with back on Earth, in training; but it was more closely and carefully constructed than even those marvels.

“I want nothing with you,” Didyak said, leaning against the door-frame. “You have other questions?”

Korvin sighed. “What are you doing here, then?” he asked. As conversation, it wasn’t very choice; but it was, he admitted, better than solitude.

“I am leaning against the door,” Didyak said. The Tr’en literalist approach to the smallest problems of everyday living was a little hard to get the hang of, Korvin told himself bitterly. He thought for a second.

“Why did you come to me?” he said at last.

Didyak beamed at him. The sight was remarkably unpleasant, involving as it did the disclosure of the Tr’en fifty-eight teeth, mostly pointed. Korvin stared back impassively. “I have been ordered to come to you,” Didyak said, “by the Ruler. The Ruler wishes to talk with you.”

It wasn’t quite “talk”; that was a general word in the Tr’en language, and Didyak had used a specific meaning, roughly: “gain information from, by peaceful and vocal means.” Korvin filed it away for future reference. “Why did the Ruler not come to me?” Korvin asked.

“The Ruler is the Ruler,” Didyak said, slightly discomfited. “You are to go to him. Such is his command.”

Korvin shrugged, sighed and smoothed back his hair. “I obey the command of the Ruler,” he said--another ritual. Everybody obeyed the command of the Ruler. If you didn’t, you never had a second chance to try.

But Korvin meant exactly what he’d said. He was going to obey the commands of the Ruler of the Tr’en--and remove the Tr’en threat from the rest of the galaxy forever.

That, after all, was his job.

The Room of the Ruler was large, square and excessively brown. The walls were dark-brown, the furnishings--a single great chair, several kneeling-benches and a small table near the chair--were light-brown, of some metallic substance, and even the drapes were tan. It was, Korvin decided, much too much of a bad idea, even when the color contrast of the Tr’en themselves were figured in.

The Ruler himself, a Tr’en over seven feet tall and correspondingly broad, sat in the great chair, his four fingers tapping gently on the table near him, staring at Korvin and his guards. The guards stood on either side of their captive, looking as impassive as jade statues, six and a half feet high.

Korvin wasn’t attempting to escape. He wasn’t pleading with the Ruler. He wasn’t defying the Ruler, either. He was just answering questions.

The Tr’en liked to have everything clear. They were a logical race. The Ruler had started with Korvin’s race, his name, his sex--if any--and whether or not his appearance were normal for humanity.

Korvin was answering the last question. “Some men are larger than I am,” he said, “and some are smaller.”

“Within what limits?”

Korvin shrugged. “Some are over eight feet tall,” he said, “and others under four feet.” He used the Tr’en measurement scale, of course; it didn’t seem necessary, though, to mention that both extremes of height were at the circus-freak level. “Then there is a group of humans,” he went on, “who are never more than a foot and a half in height, and usually less than that--approximately nine or ten inches. We call these children,” he volunteered helpfully.

“Approximately?” the Ruler growled. “We ask for precision here,” he said. “We are scientific men. We are exact.”

Korvin nodded hurriedly. “Our race is more ... more approximate,” he said apologetically.

“Slipshod,” the Ruler muttered.

“Undoubtedly,” Korvin agreed politely. “I’ll try to do the best I can for you.”

“You will answer my questions,” the Ruler said, “with exactitude.” He paused, frowning slightly. “You landed your ship on this planet,” he went on. “Why?”

“My job required it,” Korvin said.

“A clumsy lie,” the Ruler said. “The ship crashed; our examinations prove that beyond any doubt.”

“True,” Korvin said.

“And it is your job to crash your ship?” the Ruler said. “Wasteful.”

Korvin shrugged again. “What I say is true,” he announced. “Do you have tests for such matters?”

“We do,” the Ruler told him. “We are an exact and a scientific race. A machine for the testing of truth has been adjusted to your physiology. It will be attached to you.”

Korvin looked around and saw it coming through the door, pushed by two technicians. It was large and squat and metallic, and it had wheels, dials, blinking lights, tubes and wires, and a seat with armrests and straps. It was obviously a form of lie-detector--and Korvin felt himself marveling again at this race. Earth science had nothing to match their enormous command of the physical universe; adapting a hypnopædic language-course to an alien being so quickly had been wonder enough, but adapting the perilously delicate mechanisms that necessarily made up any lie-detector machinery was almost a miracle. The Tr’en, under other circumstances, would have been a valuable addition to the Comity of Nations.

Being what they were, though, they could only be a menace. And Korvin’s appreciation of the size of that menace was growing hourly.

He hoped the lie-detector had been adjusted correctly. If it showed him telling an untruth, he wasn’t likely to live long, and his job--not to mention the strongest personal inclinations--demanded most strongly that he stay alive.

He swallowed hard. But when the technicians forced him down into the seat, buckled straps around him, attached wires and electrodes and elastic bands to him at appropriate places and tightened some final screws, he made no resistance.

“We shall test the machine,” the Ruler said. “In what room are you?”

“In the Room of the Ruler,” Korvin said equably.

“Are you standing or sitting?”

“I am sitting,” Korvin said.

“Are you a chulad?” the Ruler asked. A chulad was a small native pet, Korvin knew, something like a greatly magnified deathwatch beetle.

“I am not,” he said.

The Ruler looked to his technicians for a signal, and nodded on receiving it. “You will tell an untruth now,” he said. “Are you standing or sitting?”

“I am standing,” Korvin said.

The technicians gave another signal. The Ruler looked, in his frowning manner, reasonably satisfied. “The machine,” he announced, “has been adjusted satisfactorily to your physiology. The questioning will now continue.”

Korvin swallowed again. The test hadn’t really seemed extensive enough to him. But, after all, the Tr’en knew their business, better than anyone else could know it. They had the technique and the logic and the training.

He hoped they were right.

The Ruler was frowning at him. Korvin did his best to look receptive. “Why did you land your ship on this planet?” the Ruler said.

“My job required it,” Korvin said.

The Ruler nodded. “Your job is to crash your ship,” he said. “It is wasteful but the machines tell me it is true. Very well, then; we shall find out more about your job. Was the crash intentional?”

Korvin looked sober. “Yes,” he said.

The Ruler blinked. “Very well,” he said. “Was your job ended when the ship crashed?” The Tr’en word, of course, wasn’t ended, nor did it mean exactly that. As nearly as Korvin could make out, it meant “disposed of for all time.”

“No,” he said.

“What else does your job entail?” the Ruler said.

Korvin decided to throw his first spoke into the wheel. “Staying alive.”

The Ruler roared. “Do not waste time with the obvious!” he shouted. “Do not try to trick us; we are a logical and scientific race! Answer correctly.”

“I have told the truth,” Korvin said.

“But it is not--not the truth we want,” the Ruler said.

Korvin shrugged. “I replied to your question,” he said. “I did not know that there was more than one kind of truth. Surely the truth is the truth, just as the Ruler is the Ruler?”

“I--” The Ruler stopped himself in mid-roar. “You try to confuse the Ruler,” he said at last, in an approximation of his usual one. “But the Ruler will not be confused. We have experts in matters of logic”--the Tr’en word seemed to mean right-saying--”who will advise the Ruler. They will be called.”