The Troogs took one century to master the planet, then another three to restock it with men, its once dominant but now conquered species. Being hierarchical in temper, the Troogs segregated homo insipiens into four castes between which there was no traffic except that of bloodshed. The four castes derived from the Troog experience of human beings.

The planet's new masters had an intermittent sense of the absurd; Troog laughter could shake a forest. Young Troogs first captured some surviving children, then tamed them as "housemen," though to their new pets the draughty Troog structures seemed far from house-like. Pet-keeping spread. Whole zoos of children were reared on a bean diet. For housemen, Troogs preferred children with brown or yellow skins, finding them neater and cleaner than others; this preference soon settled into an arbitrary custom. Themselves hermaphrodite, the Troogs were fascinated by the spectacle of marital couplings. Once their pets reached adolescence, they were put in cages whose nesting boxes had glass walls. Troogs would gaze in by the hour. Captivity—and this was an important discovery—did not inhibit the little creatures from breeding, nor, as was feared, did the sense of being watched turn the nursing females to deeds of violence. Cannibalism was rare. Breeders, by selecting partners, could soon produce strains with certain comical features, such as cone-shaped breasts or cushion-shaped rumps.

The practice of keeping pets was fought by senior Troogs; the conservative disapproved of innovations while the fastidious found it objectionable when bean-fed humans passed malodorous wind. After the innovation became too general to suppress, the Troog elders hedged the practice with laws. No pet should be kept alive if it fell sick, and since bronchitis was endemic, pets had short lives. The young Troogs recognised the wisdom behind this rule for they too disliked the sound of coughing. But in some cases they tried to save an invalid favourite from the lethal chamber, or would surrender it only after assurances that the sick were happier dead.

Adaptability had enabled the Troogs to survive their travels through time and space; it helped them to a catholic approach to the food provided by the planet, different as this was from their previous nourishment. Within two generations they had become compulsive carnivores. The realisation, derived from pet-keeping, that captive men could breed, led to the establishment of batteries of capons, the second and largest human caste. Capons were naturally preferred when young, since their bones were supple; at this time they fetched, as "eat-alls," the highest price for the lowest weight. Those kept alive after childhood were lodged in small cages maintained at a steady 22 degrees; the cage floors were composed of rolling bars through which the filth fell into a sluice. Capons were not permitted to see the sky or smell unfiltered air. Experience proved that a warm pink glow kept them docile and conduced to weight-gain. Females were in general preferred to males and the eradication of the tongue (sold as a separate delicacy) quietened the batteries.

The third category—the ferocious hound-men—were treated even by the Troogs with a certain caution; the barracks in which they were kennelled were built as far as possible from the batteries lest the black predators escape, break in and massacre hundreds. Bred for speed, obedience and ruthlessness, they were underfed. Unleashed they sped like greyhounds. Their unreliable tempers doomed the few surreptitious efforts to employ them as pets. One night they kept their quarters keening in rhythmic sound; next day, they slumped in yellow-eyed sulks, stirring only to lunge at each other or at their keepers' tentacles. None were kept alive after the age of thirty. Those injured in the chase were slaughtered on the spot and minced for the mess bowl.

Paradoxically, the swift hound-men depended for survival on the quarry they despised and hunted: the fourth human caste, the caste most hedged with laws.

The persistence, long into the first Troog period, of lone nomadic rebels, men and women who resisted from remote valleys and caves, had perplexed the planet's rulers. Then they made an advantage out of the setback. The wits and endurance of the defeated showed that the Troogs had suppressed a menace of some mettle. This was a compliment and Troogs, like the gods of fable, found praise enjoyable. They decided to preserve a caste of the uncorralled. This fourth caste, known as quarry-men or game, were protected within limits and seasons. It was forbidden, for example, to hunt pre-adolescents or pregnant females. All members of the caste enjoyed a respite during eight months of each year. Only at the five-yearly Nova Feast—the joyous commemoration of the greatest escape in Troog history—were all rules abandoned: then the demand for protein became overpowering.

Quarry-men excited more interest in their masters than the three other castes put together. On one level, gluttonous Troogs found their flesh more appetising than that of capons. On another, academically minded Troogs studied their behavior-patterns. Moralising Troogs extolled their courage against hopeless odds to a Troog generation inclined to be complacent about its power. The ruins which spiked the planet were testimony to the rudimentary but numerous civilisations which, over ten millennia, men had produced, from the time when they first cultivated grains and domesticated animals till their final achievement of an environment without vegetation (except under glass) and with only synthetic protein. Men, it was true, had never reached the stage where they could rely on the telepathy that served the Troogs. But this was no reason to despise them. Originally Troogs, too, had conversed through sound hitting a tympanum; they had retained a hieroglyphic system deep into their journey through time; indeed, their final abandonment of what men called writing (and the Troogs "incising") had been an indirect tribute to men: telepathic waves were harder to decipher than symbols. It moved antiquarian Troogs to see that some men still frequented the ruined repositories of written knowledge; and though men never repaired these ancient libraries, this did not argue that they had lost the constructional talents of forbears who had built skyscrapers and pyramids. It showed shrewd sense. To repair old buildings or build new ones would attract the hound-men. Safety lay in dispersal. Libraries were a place of danger for a quarry-man, known to the contemptuous hound-men as a "book-roach." The courageous passion for the little volumes in which great men had compressed their wisdom was admired by Troogs. In their death throes quarry-men often clutched these talismans.

It was through a library that, in the fifth Troog century, the first attempt was made to communicate between the species, the conquerors and the conquered.

Curiosity was a characteristic shared by both species. Quarry-men still debated what the Troogs were and where they had come from. The first generation had known them as Extra-Terrestrials, when Terra, man's planet, was still the normative centre. Just as the natives of central America had welcomed the Spaniards as gods till the stake gave the notion of the godlike a satanic quality, millions of the superstitious had identified the Troogs with angels. But Doomsday was simply Troog's Day. The planet continued spinning, the sun gave out its heat and the empty oceans rolled against their shores. Living on an earth no longer theirs, quarry-men gazed at the glittering laser beams and reflected light which made the Troog-Halls and speculated about their tenants. A tradition declared that the first space vehicles had glowed with strange pictures. The Troogs, it was correctly deduced, had originally conversed by means analogous to language but had discarded speech in order to remain opaque, untappable. This encouraged some would-be rebels. They saw in precaution signs of caution and in caution proof of fallibility. A counter-attack might one day be possible, through science or magic. Some cynics pretended to find the Troogs a blessing. They quoted a long-dead writer who had believed it was better for a man to die on his feet when not too old. This was now the common human lot. Few quarry-men lived past thirty and the diseases of the past, such as cardiac failure and carcinoma, were all but unknown. But most men dreamed simply of a longer and easier existence.

The first human to be approached by a Troog was a short, stocky youth who had survived his 'teens thanks to strong legs, a good wind and the discovery of a cellar underneath one of the world's largest libraries. Because of his enthusiasm for a poet of that name, this book-roach was known to his group as "Blake." He had also studied other idealists such as the Egyptian Akhenaten and the Russian Tolstoy. These inspired him to speculate along the most hazardous paths, in the direction, for example, of the precipice-question: might not the Troogs have something akin to human consciousness, or even conscience? If so, might man perhaps address his conqueror? Against the backspace of an insentient universe one consciousness should greet another. His friends, his woman, laughed at the^notion. They had seen what the Troogs had done to their species. Some men were bred to have protuberant eyes or elongated necks; others were kept in kennels on insufficient rations, and then, at the time of the Nova Feast or in the year's open season, unleashed through urban ruins or surrounding savannah to howl after their quarry—those related by blood and experience to Blake and his fellows. "I shall never trust a Troog," said his woman's brother, "even if he gives me a gold safe-conduct."

One Troog, as much an exception among his species as Blake among his, read this hopeful brain. It was still the closed season and some four months before the quinquennial Nova Feast. Quarry-men still relaxed in safety; the hounds sang or sulked; the Troogs had yet to prepare the lights and sounds for their tumultuous celebrations. Each morning Blake climbed to the Library. It was a long, rubbish-encumbered place with aisles still occupied by books, once arranged according to subject, but now higgledy-piggledy in dust and dereliction, thrown down by earthquake or scattered in the hunt. Each aisle had its attendant bust—Plato, Shakespeare, Darwin, Marx—testifying to a regretted time when men, divided by nationality, class or colour, suffered only from their fellows.

In the corner watched by Shakespeare, Blake had his reading place. He had restored the shelves to some order; he had dusted the table. This May morning a Troog's fading odour made him tremble. A new object stood on his table: a large rusty typewriter of the most ancient model. In it was a sheet of paper.

Blake bent to read.

Are you ready to communicate question.

Blake typed the single word: yes.

He did not linger but retreated in mental confusion to the unintellec-tual huddle round babies and potatoes which was his cellar. He half feared that he had begun to go mad, or that some acquaintance was playing him a trick. But few of his group read and no man could duplicate the distinctive Troog smell.

The days that followed constituted a continual seance between "his" Troog and himself. Blake contributed little to the dialogue. His Troog seemed anxious for a listener but little interested in what that listener thought. Blake was an earphone, an admiring confessor. Try as he feebly did, he got no response when he tried to evoke his woman, his children.

"Trooghaft, you are right," wrote the unseen communicator, attested each time by his no longer frightening scent, "was noble once." Blake had made no such suggestion. "The quality of being a Troog was un-frictional as space and as tolerant as time. It has become—almost human."

Then next morning: "To copy the habits of lower creatures is to sink below them. What is natural to carnivores is unnatural to us. We never ate flesh before the Nova; nor on our journey. We adopted the practice from reading the minds of lower creatures, then copying them. Our corruption shows in new diseases; earlier than in the past, older Troogs decompose. It shows in our characters. We quarrel like our quarry. Our forms are not apt for ingesting so much protein. Protein is what alcohol was to humans. It maddens; it corrupts. Protein, not earth's climate, is paling our. . .."

Here there was a day's gap before the typewriter produced, next morning, the word complexion. And after it, metaphor. Blake had learnt that the old Troog hieroglyphs were followed by determinants, symbols showing, for example, whether the concept rule meant tyranny or order. Complexion could only be used metaphorically of faceless and largely gaseous creatures.

To one direct question Blake obtained a direct answer: "How," he had typed, "did you first turn against the idea of eating us?"

"My first insight flashed at our last Nova Feast. Like everyone, I had been programmed to revel. Stench of flesh filled every Troog-Hall. Amid the spurt of music, the ancient greetings with which we flare still, the coruscations, I passed a meat-shop where lights pirouetted. I looked. I saw. Hanging from iron hooks—each pierced a foot-palm—were twenty she-capons, what you call women. Each neck was surrounded by a ruffle to hide the knife-cut; a tomato shut each anus. I suddenly shuddered. Nearby, on a slab of marble, smiled a row of jellied heads. Someone had dressed their sugar-hair in the manner of your Roman empresses: 'Flavian Heads.' A mass of piled up, tong-curled hair in front, behind a bun encoiled by a marzipan fillet. I lowered myself and saw as though for the first time great blocks of neutral-looking matter: 'Pate of Burst Liver.' The owner of the shop was glad to explain. They hold the woman down, then stuff nutriment through a V-shaped funnel. The merchant was pleased by my close attention. He displayed his Sucking Capons and Little Loves, as they call the reproductive organs which half of you split creatures wear outside your bodies."

"Was this," I asked in sudden repugnance, "Trooghaft?"

Encouraged by evidence of soul, Blake brought to the Troog's notice, from the miscellaneous volumes on the shelves, quotations from his favourite writers and narrative accounts of such actions as the death of Socrates, the crucifixion of Jesus and the murder of Che Guevara. Now in the mornings he found books and encyclopaedias open on his table as well as typed pages. Sometimes Blake fancied that there was more than one Troog smell; so perhaps his Troog was converting others.

Each evening Blake told Janine, his partner, of his exploits. She was at first sceptical, then half-persuaded. This year she was not pregnant and therefore could be hunted. For love of her children, the dangers of the Nova season weighed on her spirits. Only her daughter was Blake's; her son had been sired by Blake's friend, a fast-runner who had sprained his ankle and fallen easy victim to the hounds two years before. As the Nova Feast approached, the majority of the quarry-men in the city began to leave for the mountains. Not that valleys and caves were secure; but the mountains were vast and the valleys remote one from another. The hound-men preferred to hunt in the cities; concentrations of people made their game easier.

Blake refused to join them. Out of loyalty Janine stayed with him.

"I shall build," the Troog had written, "a bridge between Trooghaft and Humanity. The universe calls me to revive true Trooghaft. My Troog-Hall shall become a sanctuary, not a shed of butchers."

Blake asked: "Are you powerful? Can you make other Troogs follow your example?"

The Troog answered: "I can at least do as your Akhenaten did."

Blake flushed at the mention of his hero. Then added: "But Akhena-ten's experiment lasted briefly. Men relapsed. May not Troogs do likewise?" He longed for reassurance that his Troog was more than a moral dilettante.

Instead of an answer came a statement:

"We can never be equals with homo insipiens. But we can accept our two species as unequal productions of one universe. Men are small, but that does not mean they cannot suffer. Not one tongueless woman moves, upside-down, towards the throat-knife, without trembling. I have seen this. I felt pity, metaphor. Our young Troogs argue that fear gives flesh a quivering tenderness. I reject such arguments. Why should a complex, if lowly, life—birth, youth, growth to awareness—be sacrificed for one mealtime's pleasure?"

Although Blake recognised that his Troog was soliloquising, the arguments pleased him. Convinced of their sincerity, Blake decided to trust his Troog and remain where he was, not hide or run as on previous occasions. There was a sewer leading from his refuge whose remembered stench was horrible. He would stay in the cellar. On the first day of the Nova Feast he climbed as usual to his corner of the library. But today there was no paper in the typewriter. Instead, books and encyclopaedias had been pulled from the shelves and left open; they had nothing to do with poetry or the philosophers and the stench was not that of his Troog. Sudden unease seized him. Janine was alone with the children, her brother having left to join the others in the mountains. He returned to his cellar and, as his fear already predicted, found the children alone, wailing in one corner. The elder, the boy, told the doleful tale. Two hound-men had broken in and their mother had fled down the disused sewer.

Blake searched the sewer. It was empty. His one hope, as he too hid there, lay in his Troog's intervention. But neither the next day nor the day after, when he stole to the library, watching every shadow lest it turn to a hound-man, was there any message. This silence was atoned for on the third morning.

If we still had a written language, I should publish a volume of confessions." The message was remote, almost unrelated to Blake's anguish.

V

He read, "A few fat-fumes blow away a resolution. It was thus, the evening of the Nova Feast's beginning. Three Troog friends, metaphor, came to my Hall where no flesh was burning, where instead I was pondering these puny creatures to whom we cause such suffering. 'You cannot exile yourself from your group; Trooghaft is what Troogs do together.' I resisted such blandishments. The lights and sounds of the Nova were enough. I felt no craving for protein. Their laughter at this caused the laser beams to buckle and the lights to quiver. There entered four black hound-men dragging a quarry-female, filthy from the chase, her hands bound behind her. I was impassive. Housemen staggered under a great cauldron; they fetched logs. They placed the cauldron on a tripod and filled it with water; the logs were under it."

Blake shook as he read. This was the moment for his Troog to incarnate pity and save his woman.

"They now unbound and stripped the female, then set her in the water. It was cold and covered her skin with pimples.

"Again laughter, again the trembling lights and the buckling lasers.

"We, too, have been reading, brother. We have studied one of their ways of cooking. Place the lobster—their name for a long extinct sea-thing—in warm water. Bring the water gently to the boil. The lobster will be lulled to sleep, not knowing it is to be killed. Most experts account this the humane way of treating lobster.

"The logs under the cauldron gave a pleasant aroma as they started to splutter. The female was not lulled. She tried to clamber out: perhaps a reflex action. The hound-men placed an iron mesh over the cauldron."

Blake saw what he could not bear to see, heard the unhearable. The Troog's confession was humble.

"The scent was so persuasive. Try this piece,' they flashed, 'it is so tender. It will harden your scruples.' I hesitated. Outside came the noise of young Troogs whirling in the joy of satiety. A Nova Feast comes only once in five years. I dipped my hand, metaphor"—(even now the Troog pedantry was present)—"in the cauldron. If one must eat protein, it is better to do so in a civilised fashion. And as for the humanity, metaphor, of eating protein—I should write Trooghaft—if we ate no capons, who would bother to feed them? If we hunted no quarry, who would make the game-laws or keep the hound-men? At least now they live, as we do, for a season. And while they live, they are healthy. I must stop. My stomach, metaphor, sits heavy as a mountain."

As Blake turned in horror from the ancient typewriter, up from his line of retreat, keening their happiest music, their white teeth flashing, loped three lithe and ruthless hound-men. All around was the squid-like odour of their master.