by Larry Niven
Wincing with the effort, he removed his light jacket again. They had taken his small utility knife but Yellowbelly had not checked his grooming tool very well. He deployed its shaving blade instead of the nail pincers and used it to slit away the jacket's epaulets, then cut carefully at the triple-folds of cloth, grateful for his accidental choice of a woven fabric. He found that when trying to break a thread, he would cut his hand before the thread parted. Good; a single thread would support all of those rations but the water bulbs.
His wristcomp told him the kzin had been gone an hour, and the position of that ersatz 61 Ursa Majoris hanging in the sky said he should have several more hours of light, unless the builders of this zoo had fudged on their timing. "Numbers," he said. "You need better numbers." He couldn't eat a number, but knowing the right ones might feed his belly.
In the landing pad depressions lay several stones, some crushed by the cruel weight of the kzin lifeboat. He pocketed a few fragments, two with sharp edges, tied a third stone to a twenty-meter length of thread and tossed it clumsily over a branch of a vine-choked tree. But when he tried to pull those rations up to suspend them out of harm's way, that thread sawed the pulpy branch in two. Sighing, he began collecting and stripping vines. Favoring his right shoulder, ignoring the pain of the zzrou as he used his left arm, he finally managed to suspend the plastic-encased bricks of leathery meat five meters above the grass. It was easier to cache the water, running slender vines through the carrying handles and suspending the water in two bundles. He kept one brick and one water bulb, which contained perhaps two gallons of the precious stuff.
And then he made his first crucial discovery, when a trickle of moisture issued from the severed end of a vine. It felt cool, and it didn't sting his hands, and taking the inevitable plunge he licked at a droplet, and then sucked at the end of that vine. Good clean water, faintly sweet; but with what subtle poisons? He decided to wait a day before trying it again, but he was smiling a ferocious little smile.
Somewhere within an eight-cubed of kzin paces lay the transmitter for that damned thing stuck into his back. No telling exactly how far he could stray from it. "Damned right there's some telling," he announced to the breeze. "Numbers, numbers," he muttered. And straight lines. If that misbegotten son of a hairball was telling the truth—and a kzin always did—then Locklear would know within a step or so when he'd gone too far. The safe distance from that transmitter would probably be the same in all directions, a hemisphere of space to roam in. Would it let him get as far as the lake?
He found out after sighting toward the nearest edge of the lake and setting out for it, slashing at the trunks of jungle trees with a sharp stone to blaze a straight-line trail. Not exactly straight, but nearly so. He listened hard at every step, moving steadily downhill, wondering what might have a menu with his name on it.
That careful pace saved him a great deal of pain, but not enough of it to suit him. Once, studying the heat-sensors that guided a captive rattlesnake to its prey back on Earth, Locklear had been bitten on the hand. It was like that now behind and below his left shoulder, a sudden burning ache that kept aching as he fell forward, writhing, hurting his right collarbone again. Locklear scrambled backward five paces or so and the sting was suddenly, shockingly, absent. That part wasn't like a rattler bite, for sure. He cursed, but knew he had to do it: moved forward again, very slowly, until he felt the lancing bite of the zzrou. He moved back a pace and the sting was gone. "But it's cumulative," he said aloud. "Can't do this for a hobby."
He felled a small tree at that point, sawing it with a thread tied to stones until the pulpy trunk fell, held at an angle by vines. Its sap was milky. It stung his finger. Damned if he would let it sting his tongue. He couldn't wash the stuff off in lake water because the lake was perhaps a klick beyond his limit. He wondered if Yellowbelly had thought about that when he hid the transmitter.
Locklear had intended to pace off the distance he had moved from his food cache, but kzin gravity seemed to drag at his heels and he knew that he needed numbers more exact than the paces of a tiring man. He unwound all of the thread on the ball, then sat down and opened his grooming tool. Whatever forgotten genius had stamped a five-centimeter rule along the length of the pincer lever, Locklear owed him. He measured twenty of those lengths and then tied a knot. He then used that first one-meter length to judge his second knot; used it again for the third; and with fingers that stung from tiny cuts, tied two knots at the five-meter point. He tied three knots at the ten-meter point, then continued until he had fifteen meters of surveying line, ignoring the last meter or so.
He needed another half-hour to measure the distance, as straight as he could make it, back to the food cache: 437 meters. He punched the datum into his wristcomp and rested, drinking too much from that water bulb, noting that the sunlight was making longer shadows now. The sundown direction was "West" by definition. And after sundown, what? Nocturnal predators? He was already exhausted, cold, and in need of shelter. Locklear managed to pile palmlike fronds as his bed in a narrow cleft of the promontory, made the best weapon he could by tying fist-sized stones two meters apart with a thread, grasped one stone and whirled the other experimentally. It made a satisfying whirr—and for all he knew, it might even be marginally useful.
The sunblaze fooled him, dying slowly while it was still halfway to his horizon. He punched the time into his wristcomp, and realized that the builders of this zoo might be limited in the degree to which they could surrogate a planetary surface, when other vast circular cages were adjacent to this one. It was too much to ask that any zoo cage be, for its specimens, the best of all possible worlds.
Locklear slept badly, but he slept. During the times when he lay awake, he felt the silence like a hermetic seal around him, broken only by the rasp and slither of distant tree fronds in vagrant breezes. Kzin-normal microorganisms, the navigator had said; maybe, but Locklear had seen no sign of animal life. Almost, he would have preferred stealthy footfalls or screams of nocturnal prowlers.
The next morning he noted on his wristcomp when the ersatz kzinti sun began to blaze—not on the horizon, but seeming to kindle when halfway to its zenith—rigged a better sling for his right arm, then sat scratching in the dirt for a time. The night had lasted thirteen hours and forty-eight minutes. If succeeding nights were longer, he was in for a tooth-chattering winter. But first: FIND THAT DAMNED TRANSMITTER.
Because it was small enough to fit in a pocket. And then, ah then, he would not be held like a lapdog on a leash. He pounded some kzin meat to soften it and took his first sightings while swilling from a water bulb.
The extension of that measured line, this time in the opposite direction, went more quickly except when he had to clamber on rocky inclines or cut one of those pulpy trees down to keep his sightings near-perfect. He had no spirit level, but estimated the inclines as well as he could, as he had done before, and used the wristcomp's trigonometric functions to adjust the numbers he took from his surveying thread. That damned kzin engineer was the kind who would be half-running to do his master's bidding, and an eight-cubed of his paces might be anywhere from six hundred meters to a kilometer. Or the hidden transmitter might be almost underfoot at the cache; but no more than a klick at most. Locklear was pondering that when the zzrou zapped him again.
He stiffened, yelped, and whirled back several paces, then advanced very slowly until he felt its first half-hearted bite, and moved back, punching in the datum, working backward using the same system to make doubly sure of his numbers. At the cache, he found his two new numbers varied by five meters and split the difference. His southwest limit had been 437 meters away, his northeast limit 529; which meant the total length of that line was 966 meters. It probably wasn't the full diameter of his circle, but those points lay on its circumference. He halved the number: 483. That number, minus the 437, was 46 meters. He measured off forty-six meters toward the northeast and piled pulpy branches in a pyramid higher than his head. This point, by God, was one
point on the full diameter of that circle perpendicular to his first line! Next he had to survey a line at a right angle to the line he'd already surveyed, a line passing through that pyramid of branches.
It took him all morning and then some, lengthening his thread to be more certain of that crucial right angle before he set off into the jungle, and he measured almost seven hundred meters before that bloody damned zzrou bit him again, this time not so painfully because by that time he was moving very slowly. He returned to the pyramid of branches and struck off in the opposite direction, just to be sure of the numbers he scratched in the dirt using the wristcomp. He was filled with joy when the zzrou faithfully poisoned him a bit over 300 meters away, within ten meters of his expectation.
Those first three limit points had been enough to rough out the circle; the fourth was confirmation. Locklear knew that he had passed the transmitter on that long northwest leg; calculated quickly, because he knew the exact length of that diameter, that it was a bit over two hundred meters from his pyramid; and measured off the distance after lunch.
"Just like that fur-licking bastard," he said, looking around him at the tangle of orange, green and yellow jungle growth. "Probably shit on it before he buried it."
Locklear spent a fruitless hour clearing punky shrubs and man-high ferns from the soft turf before he saw it, and of course it was not where he had been looking at all. "It" was not a telltale mound of dirt, nor a kzin footprint. It was a group of three globes of milky sap, no larger than water droplets, just about knee-high on the biggest palm in the clearing. And just about the right pattern for a kzin's toe-claws.
He moved around the trunk, as thick as his body, staring up the tree, now picking out other sets of milky puncture marks spaced up the trunk. More kzin clawmarks. Softly, feeling the gooseflesh move down his arms, he called, "Ollee-ollee-all's-in-free," just for the hell of it. And then he cut the damned tree down, carefully, letting the breeze do part of the work so that the tree sagged, buckled, and came down at a leisurely pace.
The transmitter, which looked rather like a wristcomp without a bracelet, lay in a hole scooped out by Yellowbelly's claws in the tender young top of the tree. It was sticky with sap, and Locklear hoped it had stung the kzin as it was stinging his own fingers. He wiped it off with vine leaves, rinsed it with dribbles of water from severed vines, wiped it off again, and then returned to his food cache.
"Yep, the shoulder hurts, and the damned gravity doesn't help but," he said, and yelled it at the sky, "Now I'm loose, you rat-tailed sons of bitches!"
* * *
He spent another night at the first cache, now with little concern about things that went boomp in the ersatz night. The sunblaze dimmed thirteen hours and forty-eight minutes after it began, and Locklear guessed that the days and nights of this synthetic arena never changed. "It'd be tough to develop a cosmology here," he said aloud, shivering because his right shoulder simply would not let him generate a fire by friction. "Maybe that was deliberate." If he wanted to study the behavior of intelligent species without risking their learning too much, and had not the faintest kind of ethics about it, Locklear decided he might imagine just such a vast enclosure for the kzinti. Only they were already a spacefaring race, and so was humankind, and he could have sworn the adjacent area on this impossible zoo planet was a ringer for one of the wild areas back on Earth. He cudgeled his memory until he recalled the lozenge shape of that lake seen from orbit, and the earthlike area.
"Right—about—there," he said, nodding to the southwest, across the lake. "If I don't starve first."
He knew that any kzinti searching for him could simply home in on the transmitter. Or maybe not so simply, if the signal was balked by stone or dirt. A cave with a kink in it could complicate their search nicely. He could test the idea—at the risk of absorbing one zap too many from that infuriating zzrou clinging to his back.
"Well, second things second," he said. He'd attended to the first things first. He slept poorly again, but the collarbone seemed to be mending.
Locklear admitted an instant's panic the next morning (he had counted down to the moment when the ersatz sun began to shine, missing it by a few seconds) as he moved beyond his old limit toward the lake. But the zzrou might have been a hockey puck for its inertness. The lake had small regular wavelets—easy enough to generate if you have a timer on your gravity polarizer, he mused to the builders—and a narrow beach that alternated between sand and pebbles. No prints of any kind, not even birds or molluscs. If this huge arena did not have extremes of weather, a single footprint on that sand might last a geologic era.
The food cache was within a stone's throw of the kzin landing, good enough reason to find a better place. Locklear found one, where a stream trickled to the lake (pumps, or rainfall? Time enough to find out), after cutting its passage down through basalt that was half-hidden by foliage. Locklear found a hollow beneath a low waterfall and, in three trips, portaged all his meagre stores to that hideyhole with its stone shelf. The water tasted good, and again he tested the trickle from slashed vines because he did not intend to stay tied to that lakeside forever.
The channel cut through basalt by water told him that the stream had once been a torrent and might be again. The channel also hinted that the stream had been cutting its patient way for tens of centuries, perhaps far longer. "Zoo has been here a long time," he said, startled at the tinny echo behind the murmur of water, realizing that he had begun to think of this planet as "Zoo." It might be untenanted, like that sad remnant of a capitalist's dream that still drew tourists to San Simeon on the coast of Earth's California. Cages for exotic fauna, but the animals long since gone. Or never introduced? One more puzzle to be shelved until more pieces could be studied.
During his fourth day on Zoo, Locklear realized that the water was almost certainly safe, and that he must begin testing the tubers, spiny nuts, and poisonous-looking fruit that he had been eyeing with mistrust. Might as well test the stuff while circumnavigating the lake, he decided, vowing to try one new plant a day. Nothing had nibbled at anything beyond mosslike growths on some soft-surfaced fruit. He guessed that the growths meant that the fruit was overripe, and judged ripeness that way. He did not need much time deciding about plants that stank horribly, or that stung his hands. On the seventh day on Zoo, while using a brown plant juice to draw a map on plastic food wrap (a pathetic left-handed effort), he began to feel distinct localized pains in his stomach. He put a finger down his throat, bringing up bits of kzin rations and pieces of the nutmeats he had swallowed after trying to chew them during breakfast. They had gone into his mouth like soft rubber capsules, and down his throat the same way.
But they had grown tiny hair-roots in his belly, and while he watched the nasty stuff he had splashed on stone, those roots continued to grow, waving blindly. He applied himself to the task again and finally coughed up another. How many had he swallowed? Three, or four? He thought four, but saw only three, and only after smashing a dozen more of the nutshells was he satisfied that each shell held three, and only three, of the loathsome things. Not animals, perhaps, but they would eat you nonetheless. Maybe he should've named the place "Herbarium." The hell with it:
"Zoo" it remained.
On the ninth day, carrying the meat in his jacket, he began to use his right arm sparingly. That was the day he realized that he had rounded the broad curve of the lake and, if his brief memory of it from orbit was accurate, the placid lake was perhaps three times as long as it was wide. He found it possible to run, one of his few athletic specialties, and despite the wear of kzin gravity he put fourteen thousand running paces behind him before exhaustion made him gather high grasses for a bed.
At a meter and a half per step, he had covered twenty-one klicks, give or take a bit, that day. Not bad in this gravity, he decided, even if the collarbone was aching again. On his abominable map, that placed him about midway down the long side of the lake. The following morning he turned west, following another stream through an ope
n grassy plain, jogging, resting, jogging. He gathered tubers floating downstream and ate one, fearing that it would surely be deadly because it tasted like a wild strawberry.
He followed the stream for three more days, living mostly on those delicious tubers and water, nesting warmly in thick sheaves of grass. On the next day he spied a dark mass of basalt rising to the northwest, captured two litres of water in an empty plastic bag, and risked all. It was well that he did for, late in the following day with heaving chest, he saw clouds sweeping in from the north, dragging a gray downpour as a bride drags her train. That stream far below and klicks distant was soon a broad river which would have swept him to the lake. But now he stood on a rocky escarpment, seeing the glisten of water from those crags in the distance, and knew that he would not die of thirst in the highlands. He also suspected, judging from the shredded-cotton roiling of cloud beyond those crags, that he was very near the walls of his cage.
* * *
Even for a runner, the two-kilometer rise of those crags was daunting in high gravity. Locklear aimed for a saddleback only a thousand meters high where sheets of rain had fallen not long before, hiking beside a swollen stream until he found its source. It wasn't much as glaciers went, but he found green depths of ice filling the saddleback, shouldering up against a force wall that beggared anything he had ever seen up close.
The wall was transparent, apparent to the eye only by its effects and by the eldritch blackness just beyond it. The thing was horrendously cold, seeming to cut straight across hills and crags with an inner border of ice to define this kzin compound. Locklear knew it only seemed straight because the curvature was so gradual. When he tossed a stone at it, the stone slowed abruptly and soundlessly as if encountering a meters-deep cushion, then slid downward and back to clatter onto the minuscule glacier. Uphill and down, for as far as he could see, ice rimmed the inside of the force wall. He moved nearer, staring through that invisible sponge, and saw another line of ice a klick distant. Between those ice rims lay bare basalt, as uncompromisingly primitive as the surface of an asteroid. Most of that raw surface was so dark as to seem featureless, but reflections from ice lenses on each side dappled the dark basalt here and there. The dapples of light were crystal clear, without the usual fuzziness of objects a thousand meters away, and Locklear realized he was staring into a vacuum.