"I've missed you so much," I told her. "But what are you doing here anyway?"

"Hush"-she kissed me, and for a moment the world went away-"my brave, butch, bullish Ralphie!" She sighed again. "I was going to hold out until after the race! But I had just checked into the Hilton when I received a telephone call saying there was a gentleman waiting to see me in the lobby."

Jealousy stabbed at me. "Who was it?" I asked, cringing and glancing away as Edgestar rolled past, having transformed himself into a tentacularly enhanced chaise for the amusement of the blond bimbettebot, who appeared to be riding him around the room using his unmentionables as a joystick.

"I don't remember," she said dreamily. "I woke up here, waiting for my prince-you! I do declare-but Toshiro said he was arranging a surprise, and there'd be a party, and then it all went a little vague-"

I can tell you, I was freezing inside as I began to realize just how disoriented she was. "Laura, what's gotten into you?"

"Not you, not lately!" she said sharply, then lapsed back into dreamy incoherence. "But you came to rescue me, Ralphie, oh! He said you would. I swoon for you! Be my love rocket again!"

I saw a small silver receptacle on a nearby table, and my heart sank: she'd clearly been at the happy juice. Then I sneaked a peek at the sockets on the back of her neck, under her hairline, and gasped. Someone had planted a hedonism chip and a mandatory override on her! No wonder she was acting out of sorts.

I plucked the ghastly thing out and dropped it on the floor. "Laura, stand up!" I cajoled. "We've got to be leaving. There's a party to be going to, don't you know? Let's go."

"But my-" She wobbled, then toppled against me. "Whoops!" She giggled. "Hic." "Hic." I might have pulled the chips out of the fryer, but my fish was still thoroughly pickled. I might have pulled the chips out of the fryer, but my fish was still thoroughly pickled.

I hadn't expected this, but Miss Feng had insisted I take a reset pill, just in case. I hated to use the thing on her-or rather, Laura hated it, and this invariably led to a fight afterward-but sobriety is a lesser evil than being trapped in a castle run by a mad vizier and subjected to mood-altering implants, what? So I pressed the silver cap against the side of her neck and pushed the button.

Laura's jaws closed with an audible click, and she tensed in my arms for a second. "Ouch," she said, very quietly. "You bastard, you know know I hate that. What's going on?" I hate that. What's going on?"

"You're on Mars, and we're in a bally fix, that's what's going on. This Ibn Cut-Throat fellow's a thoroughly bad egg. He's sneaked a spinal crab onto old Abdul, I think he picked you up because he wants a handle on me, and doubtless that's why the rest of the Club's all here-we'd be first to notice a change in our boy Abdul's behavior, wouldn't we? The cad's obviously set up the sticky wicket so he can bowl us all out in one inning."

"Dear me." Laura stood up straight and took a step away from me. "Well, then we'd better be going, darling." She straightened her attire and looked around, raising one sculpted eyebrow at my dishev elment. "Do you know how to get out of here?"

"Certainly." I took her hand in mine, and led her toward the central gallery. "I'm sure there must be a way out around here somewhere . . ."

"Over there," offered bin-Sawbones, pointing. "You can't miss it, head for the two hulking eunuchs and the evil vizier." She pushed me hard in the small of my back. "Sorry, but business is business. When you're trying to marry the second-richest man on Mars, you can't afford to be too picky, eh?"

JEREMY PULLS IT OFF

The exit was indeed obstructed by Ibn Cut-Throat and his merry headsmen-with Abdul in tow, glassy-eyed and arms outstretched, muttering something about brains. And Ibn Cut-Throat had spotted us!

One thing I will credit the blighter with: his sense of spectacle was perfect. "Ah, Mister MacDonald!" he cried, menacingly twirling the antichemwar vibrissae glued to his upper lip. "How disappointing to see you here! I must confess I hoped you'd have sense enough to stay in your room and keep out of trouble. I suppose now you hope I'm going to tell you all my plans, then lock you in an inadequately secured cell so you can escape? I'm afraid not: I shall simply have you cut off shortly, chop-chop. My game's afoot, and none will stop it now, for the ineluctable dialectic of history is on my side!"

"I don't care what your dastardly scheme is, I have a bone to pick with you, my man!" I cried. The two headsmen took a step forward, and Laura clung to me in fear-whether feigned or otherwise I could not tell. "How dare you kidnap my concubine on the eve of a drop! That's not cricket, or even baseball, and it'll be a cold day in hell before I see you in any of my clubs, even by the tradesmen's entrance!" Meanwhile, Laura thrust a shapely arm inside my abaya and was fumbling with something in my dinner-jacket pocket; but my attention was fixed on the villain before me.

"Clubs." The word dropped from his lips with stony disinterest. "As if the degenerate recreations of the oligopatriarchal enemy would be of any interest to me!" I shuddered: it's always a bad sign when the hired help starts talking in polysyllables. One of his nostrils flared angrily. "Clubs and sports and jolly capers, that's all you parasites think of as you gobble down our surplus wealth like the monstrous leeches you are!" I'd struck a nerve, as I could see from the throbbing vein in his temple. "Bloated ticks languishing in the lap of luxury and complaining about your parties and fashions while millions slave to fuel your banquets! Bah." Laura unwrapped her arm from my robe and covered her face, evidently to shield herself from the scoundrel's accusations. "When we strive to better ourselves, you turn your faces away and sneer, and when we bend our necks, you use us as beasts of burden! Well, I've had enough. It's time to return your stolen loot to the toiling non-U masses."

My jaw dropped. "Dash it all, man, you can't be serious! Are you telling me you're a . . . ?"

"Yes," he grated, his eyes aflame with vindictive glee, "the crisis of capitalism is finally at hand, at long last! It's about seven centuries and a Great Downsizing overdue, but it's time to bring about the dictatorship of the non-U and the resurrection of the proletariat! And your friend Abdul al-Matsumoto is going to play a key role in bringing about the final raising of class consciousness, by fertilizing the soil of Olympus with the blood of a thousand maidens, then crown himself Big Brother and institute a reign of terror that will-"

Unfortunately, I can't tell you how the Ibn Cut-Throat Committee for the Revolution intended to proceed, because we were interrupted by two different people: by Laura, who extended her shapely hand and spritzed him down with aftershave, then by Jeremy.

Now, it helps to be aware that harems are not exactly noted for their testosterone-drenched atmosphere. I was, of course, the odd squishie out. Old Edgy was clearly hors de combat or combat des whores (if you'll strangle my French), and the Toadster was also otherwise engaged, exploring conic sections with the femmebot he'd been chasing earlier. But aside from myself and Ibn Cut-Throat-and, I suppose, Abdul, if he was still at home upstairs what with that crab-thingie plastered to his noggin-there weren't any other remotely butch people present.

Jeremy had been in smelly, sullen retreat for the past week. Not to put too fine a point on it, he was in musth, that state in which a male mammoth or elephant hates and resents other males because the universe acquires a crystal clarity and his function in life is to . . . Well, Edgestar and Toadsworth got there first, minus the trumpeting and displays of aggression, but I'm sure you understand? There were no other small male mammals present, but Jeremy was well aware of his enemy, and his desperate need to assert his alpha-male dominance before he could go in search of cows to cover-and more importantly, there was one particular scent he associated with the enemy from long mutual acquaintance. His enemy smelled like me me. But I I was shrouded in a blackly occlusive robe, while Ibn Cut-Throat had just been doused in my favorite pheromone-enhanced splash. And whatever Jeremy's other faults, he's never been slow to jump to a conclusion. was shrouded in a blackly occlusive robe, while Ibn Cut-Throat had just been doused in my favorite pheromone-enhanced splash. And whatever Jeremy's other faults, he's never been slow to jump to a conclusion.

I do not know what passed through the 80 percent of Jeremy's cranial capacity that serves as target acquisition and fire control, but he made his choice almost instantly and launched himself straight for where Ibn Cut-Throat's crown jewels had once resided. Proboscide ans are not usually noted for their glide ratio, but in the weak Martian gravity Jeremy was positively areobatic, and he aimed straight for Toshiro's tushie with grace and elegance and tusks.

"Tally-ho, old boy!" I shouted, giving him the old-school best, as Laura took two steps smartly forward and, raising her skirts, daintily kick-boxed headsman number one in the forehead with one of her most pointed assets-for her ten-centimeter stiletto heels are not only jolly fine pins, they're physical extensions of her chrome-plated ankles.

Now I confess that things looked dicey when headsman number two turned on me with his ax and bared his teeth at me. But I'm not the Suzuki of MacDonald for nothing, and I know a thing or two about fighting! I threw the abaya back over my head to free my arms, and pointed Toadsworth's inebriator-which he had earlier entrusted to my safekeeping in order to free up a socket for his inseminator-at the villain. "Drop it! Or I'll drop you!" I snarled.

My threat didn't work. The thug advanced on me, and as he raised his blade I discovered to my horror that the Toadster must have some very strange fingers in order to work that trigger. But just as the barber of Baghdad was about to trim my throat, a svelte black silhouette drew up behind him and poured a canister of vile brown ichor over his head! Screaming and burbling imprecations, he sank to the floor clawing at his eyes, just in time for Laura to finish him off with a flamenco stomp.

Miss Feng cleared her throat apologetically as she lowered the empty firkin to the floor. (The brightly painted tiles began to blur and run where its Bragote-damp rim rested on them.) "Sir might be pleased to note that one has taken the liberty of moving his yacht round to the tradesmen's entrance and disabling the continental defense array in anticipation of Sir's departure. Was Sir planning to stay for the bombe surprise, or would he agree that this is one party that he would prefer to cut short?"

I glanced at Ibn Cut-Throat, who was still writhing in agony under Jeremy's merciless onslaught, and then at the two pithed headsmen. "I think it's a damned shame to outstay our welcome at any party, don't you agree?" Laura nodded enthusiastically and knelt to tickle Jeremy's trunk. "By all means, let's leave. If you'd be so good as to pour a bucket of cold water over Edgy and the Toadster, I'll take Abdul in hand and we can drop him off at a discreet clinic where they treat spinal crabs, what-what?"

"That's a capital idea, sir. I shall see to it at once." Miss Feng set off to separate the miscreants from their amorous attachments.

I turned to Laura, who was still tickling Jeremy-who by now was lying on his back, panting-and raised an eyebrow. "Isn't he sweet?" she sang.

"If you say so. You're carrying him, though," I said, ungratefully. "Let's hie thee well and back to Castle Pookie. This has been altogether too much of the wrong kind of company for me, and I could do with a nightcap in civilized company."

"Darling!" she grabbed me enthusiastically by the trousers. "And we can watch a replay of your jump together!"

And indeed, to cut a long story short, that's exactly what we did-but first I took the precaution of locking Jeremy in the second-best guest suite's dungeon with a bottle of port, and gave Miss Feng the night off.

After all, two's company, but three's jolly confusing, what?

Afterword-"Trunk and Disorderly"Humor is hard hard. Sometimes it works, but more often it doesn't; it's surprisingly difficult to make other people laugh, as any number of aspiring stand-ups have discovered. Ironically, good humor reads easily, so that we tend to be fooled into thinking that it was a trivial matter to write. One of the finest practitioners working in the English language was P. G. Wodehouse, whose interwar social comedies about the hapless young Bertie Wooster and his long-suffering butler Jeeves have become classics of the field. They're as light as souffles and as easy to absorb as air-which is why it took me three years of on-and-off blood, sweat, and tears to squeeze out "Trunk and Disorderly," which at its best aspires to the level of Wodehouse's recycling bin. In truth, drama is easy; true comedy is murderously difficult to carry off.I was hoping to get a series of stories out of this universe, but in the end I decided to cut my losses and chalked it up as a test run for Saturn's Children Saturn's Children.

Palimpsest

FRESH MEAT

This will never happen: You will flex your fingers as you stare at the back of the youth you are going to kill, father to the man who will never now become your grandfather; and as you trail him home through the snowy night, you'll pray for your soul, alone in the darkness.

Memories are going to come to you unbidden even though you'll try to focus on the task in hand. His life-that part of it which you arrived kicking and squalling in time to share with him before the end-will pass in front of your eyes. You will remember Gramps in his sixties, his hands a bunch of raisin-wrinkled grape joints as he holds your preteen wrists and shows you how to cast the fly across the water. And you'll remember the shrunken husk of his seventies, standing speechless and numb by Gran's graveside in his too-big suit, lying at last alone in the hospice bed, breath coming shallow and fast as he sleeps alone with the cancer. These won't be good memories. But you know the rest of the story too, having heard it endlessly from your parents: young love and military service in a war as distant as faded sepia photographs from another generation's front, a good job in the factory and a wife he will quietly adore who will in due course give him three children, from one of whose loins you in turn are drawn. Gramps will have a good, long life and live to see five grandchildren and a myriad of wonders, and this boy-man on the edge of adulthood who you are compelled to follow as he walks to the recruiting office holds the seeds of the man you will remember . . . But it's him or you.

Gramps would have had a good life. You must hold on to that. It will make what's coming easier.

You will track the youth who will never be your grandfather through the snow-spattered shrubbery and long grass along the side of the railroad tracks, and the wool-and-vegetable-fiber cloth that you wear-your costume will be entirely authentic-chafes your skin. By that point you won't have bathed for a week, or shaved using hot water: you are a young thug, a vagrant, and a wholly bad sort. That is what the witnesses will see, the mad-eyed young killer in the sweat-stained suit with the knife and his victim, so vulnerable with his throat laid open almost to the bone. He'll sprawl as if he is merely sleeping. And there will be outrage and alarm as the cops and concerned citizens turn out to hunt the monster that took young Gerry from his family's arms, and him just barely a man: but they won't find you, because you'll push the button on the pebble-sized box and Stasis Control will open up a timegate and welcome you into their proud and lonely ranks.

When you wake up in your dorm two hundred years-objective from now, bathed in stinking fear-sweat, with the sheet sucking onto your skin like a death-chilled caul, there will be nobody to comfort you and nobody to hold you. The kindness of your mother's hands and the strength of your father's wrists will be phantoms of memory, ghosts that echo round your bones, wandering homeless through the mausoleum of your memories.

They'll have no one to remember their lives but you; and all because you will believe the recruiters when they tell you that to join the organization you must kill your own grandfather, and that if you do not join the organization, you will die.

(It's an antinepotism measure, they'll tell you, nodding, not unkindly. And a test of your ruthlessness and determination. And besides, we all did it when it was our our turn.) turn.) Welcome to the Stasis, Agent Pierce! You're rootless now, an orphan of the time stream, sprung from nowhere on a mission to eternity. And you're going to have a remarkable remarkable career. career.

Yellowstone

"You've got to remember, humanity always goes extinct," said Wei, staring disinterestedly at the line of women and children shuffling toward the slave station down by the river. "Always. A thousand years, a hundred thousand, a quarter million-doesn't matter. Sooner or later, humans go extinct." He was speaking Urem, the language the Stasis used among themselves. A thousand years, a hundred thousand, a quarter million-doesn't matter. Sooner or later, humans go extinct." He was speaking Urem, the language the Stasis used among themselves.

"I thought that was why we were here? To try and prevent it?" Pierce asked, using the honorific form appropriate for a student questioning his tutor, although Wei was, in truth, merely a twelfth-year trainee himself: the required formality was merely one more reminder of the long road ahead of him.

"No." Wei raised his spear and thumped its base on the dry, hard-packed mud of the observation mound. "We're going to relocate a few seed groups, several tens of thousands. But the rest are still going to die." He glanced away from the slaves: Pierce followed his gaze.

Along the horizon, the bright red sky darkened to the color of coagulated blood on a slaughterhouse floor. The volcano, two thousand kilometers farther around the curve of the planet, had been pumping ash and steam into the stratosphere for weeks. Every noon, in the badlands where once the Mississippi delta had writhed, the sky wept brackish tears.

"You're from before the first extinction epoch, aren't you? The pattern wasn't established back then. That must be why you were sent on this field trip. You need to understand that this always always happens. Why we do this. You need to know it in your guts. Why we take the savages and leave the civilized to die." happens. Why we do this. You need to know it in your guts. Why we take the savages and leave the civilized to die."

Like Wei, and the other Stasis agents who had silently liquidated the camp guards and stolen their identities three nights before, Pierce was disguised as a Benzin warrior. He wore the war paint and beaten-aluminum armbands, bore the combat scars. He carried a spear tipped with a shard of synthetic diamond, mined from a deep seam of prehistoric automobile windshields. He even wore a Benzin face: the epicanthic folds and dark skin conferred by the phenotypic patches had given him food for thought, an unfamiliar departure from his white-bread origins. Gramps (he shied from the memory) would have died rather than wear this face.

Pierce was not yet even a twelve-year trainee: he'd been in the service for barely four years-subjective. But he was ready to be sent out under supervision, and this particular operation called for warm bodies rather than retrocausal subtlety.

Fifty years ago, the Benzin had swept around the eastern coastline of what was still North America, erupting from their heartland in the central isthmus to extend their tribute empire into the scattered tribal grounds of post-Neolithic nomads known to Stasis Control only by their code names: the Alabamae, the Floridae, and the Americae. The Benzin were intent on conquering the New World, unaware that it had been done at least seventeen times already since the start of the current Reseeding. They did not understand the significance of the redness in the western sky or the shaking of the ground, ascribing it to the anger of their tribal gods. They had no idea that these signs heralded the end of the current interglacial age, or that their extinction would be a side effect of the coming Yellowstone eruption-one of a series that occurred at six-hundred-thousand-year intervals during the early stages of the Lower First Anthropogenic epoch.

The Benzin didn't take a long view of things, for although their priest-kings had a system of writing, most of them lived in the haz ily defined ahistorical myth-world of the preliterate. Their time was running out all the same. Yellowstone was waking, and even the Stasis preferred to work around such brutal geological phenomena, rather than through them.

"Yes, but why take them them?" Pierce nodded toward the silently trudging Alabamae women and children, their shoulders stooped beneath the burden of their terror. They'd been walking before the spear points of their captors for days; they were exhausted. The loud ones had already died, along with the lame. The raiders who had slain their men and stolen them away to a life of slavery sat proudly astride their camels, their enemies' scalps dangling from their kote kas like bizarre pubic wigs. "The Benzin may be savages, but these people are losers-they came off worse."

Wei shook his head minutely. "The adults are all female, and mostly pregnant at that. These are the healthy ones, the ones who survived the march. They're gatherers, used to living off the land, and they're all in one convenient spot."

Pierce clenched his teeth, realizing his mistake. "You're going to use them for Reseeding? Because there are fewer bodies, and they're more primitive, more able to survive in a wilderness . . . ?"

"Yes. For a successful Reseeding we need at least twenty thousand bodies from as many diverse groups as possible, and even then we risk a genetic bottleneck. And they need to be able to survive in the total absence of civilization. If we dumped you you in the middle of a Reseeding, you would probably not last a month. No criticism intended; neither would I. Those warriors"-Wei raised his spear again, as if saluting the raiders-"require slaves and womenfolk and a hierarchy to function. The tip of your spear was fashioned by a slave in the royal armories, not by a warrior. Your moccasins and the cloth of your pants were made by Benzin slaves. They are halfway to reinventing civilization: given another five thousand years-subjunctive, their distant descendants might build steam engines and establish ubiquitous recording frameworks, bequeathing their memories to the absolute future. But for a Reseeding they're as useless as we are." in the middle of a Reseeding, you would probably not last a month. No criticism intended; neither would I. Those warriors"-Wei raised his spear again, as if saluting the raiders-"require slaves and womenfolk and a hierarchy to function. The tip of your spear was fashioned by a slave in the royal armories, not by a warrior. Your moccasins and the cloth of your pants were made by Benzin slaves. They are halfway to reinventing civilization: given another five thousand years-subjunctive, their distant descendants might build steam engines and establish ubiquitous recording frameworks, bequeathing their memories to the absolute future. But for a Reseeding they're as useless as we are."

"But they don't have half a deci-"

"Be still. They're moving."

The last of the slaves had been herded between the barbed hedges of the entrance passageway, and the gate guards lifted the heavy barrier back into position. Now the raiders kicked their mounts into motion, beating and poking them around the side of the spiny bamboo fence in a circuit of the guard posts. Wei and Pierce stood impassively as the camel riders spurred down on them. At the last moment, their leader pulled sideways, and his mount snorted and pawed at the ground angrily as he leaned toward Wei.

"Hai!" he shouted, in the tonal trade tongue of the northern Benzin. "I don't remember you!"

"I am Hawk! Who in the seventh hell are you you?"

Wei glared at the rider, but the intruder just laughed raucously and spat over the side of his saddle: it landed on the mud, sufficiently far from Wei to make it unclear whether it was a direct challenge.

Pierce tightened his grip on his spear, moving his index finger closer to the trigger discreetly printed on it. High above them, a vul turelike bird circled the zone of confrontation with unnatural precision, its fire-control systems locked on.

"I am Teuch," said the rider, after a pause. "I captured these women! In the name of our Father I took them, and in the name of our Father I got them with children to work in the paddies! What have you done for our Father today?"

"I stand here," Wei said, lifting the butt of his spear. "I guard our Father's flock while assholes like you are out having fun."

"Hai!" The rider's face split in a broad, dust-stained grin. "I see you, too!" He raised his right fist and for an instant Pierce had an icy vision of his guts unraveling around a barbarian's spear; but the camel lifted its head and brayed as Teuch nudged it in a surprisingly delicate sidestep away from Wei, away from the hedge of thorns, away from the slave station. And away from the site of the timegate through which the evacuation team would drive the camp inmates in two days' time. The prisoners would be deposited at the start of the next Reseeding. But none of the Benzin would live to see that day, a hundred thousand years-objective or more in the future.

Perhaps their camels would leave their footprints in the choking, hot rain of ash that would roll across the continent with tomorrow's sunset. Perhaps some of those footprints would fossilize, so that the descendants of the Alabamae slaves would uncover them and marvel at their antiquity in the age to come. But immortality, Pierce thought, was a poor substitute for not dying.

Paying Attention in Class

It was a bright and chilly day on the roof of the world. Pierce, his bare head shaved like the rest of the green-robed trainees, sat on a low stool in a courtyard beneath the open sky, waiting for the tutorial to begin. Riding high above the ancient stone causeway and the spiral minarets of the Library Annex, the moon bared her knife-slashed cheeks at Pierce, as if to remind him of how far he'd come.

"Good afternoon, Honorable Students."

The training camp nestled in a valley among the lower peaks of the Mediterranean Alps. Looming over the verdant lowlands of the Sahara basin, in this epoch they rose higher than the stumps of the time-weathered Himalayas.

"Good afternoon, Honorable Scholar Yarrow," chanted the dozen students of the sixth-year class.

Urem, like Japanese before it, paid considerable attention to the relative status of speaker and audience. Many of the cultures the Stasis interacted with were sensitive to matters of gender, caste, and other signifiers of rank, so the designers of Urem had added declen sions to reflect these matters. New recruits were expected to practice the formalities diligently, for a mastery of Urem was important to their future-and none of them were native speakers.

"I speak to you today of the structure of human history and the ways in which we may interact with it."

Yarrow, the Honorable Scholar, was of indeterminate age: robed in black, her hair a stubble-short golden halo, she could have been anywhere from thirty to three hundred. Given the epigenetic overhaul the Stasis provided for their own, the latter was likelier-but not three thousand. Attrition in the line of duty took its toll over the centuries. Yarrow's gaze, when it fell on Pierce, was clear, her eyes the same blue as the distant horizon. This was the first time she had lectured Pierce's class-not surprising, for the college had many tutors, and the path to graduation was long enough to tax the most disciplined. She was, he understood, an expert on what was termed the Big Picture. He hadn't looked her up in the local Library Annex ahead of time. (In his experience it was generally better to approach these lessons with an open mind. And in any case, students had only patchy access to the records of their seniors.) "As a species, we are highly unstable, prone to Malthusian crises and self-destructive wars. This apparent weakness is also our strength-when reduced to a rump of a few thousand illiterate hunter-gatherers, we can spread out and tame a planet in mere centuries, and build high civilizations in a handful of millennia.

"Let me give you some numbers. Over the two and a half million epochs accessible to us-each of which lasts for a million years-we shall have reseeded starter populations nearly twenty-one million times, with an average extinction period of sixty-nine thousand years. Each Reseeding event produces an average of eleven-point-six planet-spanning empires, thirty-two continental empires, nine hundred and sixty-odd languages spoken by more than one million people, and a total population of one-point-seven trillion individuals. Summed over the entire life span of this planet-which has been vastly extended by the cosmological engineering program you see above you every night-there are nearly twenty billion billion of us. We are not merely legion-we rival in our numbers the stars of the observable universe in the current epoch.

"Our species is legion. And throughout the vast span of our history, ever since the beginning of the first panopticon empire during our first flowering, we have committed to permanent storage a record of everything that has touched us-everything but those events that have definitively unhappened."

Pierce focused on Yarrow's lips. They quirked slightly as she spoke, as if the flavor of her words was bitter-or as if she was suppressing an unbidden humor, intent on maintaining her gravitas before the class. Her mouth was wide and sensual, and her lips curiously pale, as if they were waiting to be warmed by another's touch. Despite his training, Pierce was as easily distracted as any other twentysomething male, and try as he might, he found it difficult to focus on her words: he came from an age of hypertext and canned presentations and found that these archaic, linear tutorials challenged his concentration. The outward austerity of her delivery inflamed his imagination, blossoming in a sensuous daydream in which the wry taste of her lips blended with the measured cadences of her speech to burn like fire in his mind.

"Uncontrolled civilization is a terminal consumptive state, as the victims of the first extinction discovered the hard way. We have left their history intact and untouched, that we might remember our origins and study them as a warning; some of you in this cohort have been recruited from that era. In other epochs we work to prevent wild efflorescences of resource-depleting overindustrialization, to suppress competing abhuman intelligences, and to prevent the pointless resource drain of attempts to colonize other star systems. By shepherding this planet's resources and manipulating its star and neighboring planets to maximize its inhabitable duration, we can achieve Stasis-a system that supports human life for a thousand times the life of the unmodified sun, and that remembers the time line of every human life that ever happened."

Yarrow's facts and figures slid past Pierce's attention like warm syrup. He paid little heed to them, focusing instead on her intonation, the little twitches of the muscles in her cheeks as she framed each word, the rise and fall of her chest as she breathed in and out. She was impossibly magnetic: a puritan sex icon, ascetic and unaware, attractive but untouchable. It was foolish in the extreme, he knew, but for some combination of tiny interlocking reasons he found her unaccountably exciting.

"All of this would be impossible without our continued ownership of the timegate. You already know the essentials. What you may not be aware of is that it is a unique, easily depleted resource. The timegate allows us to open wormholes connecting two openings in four-dimensional space-time. But the exclusion principle prevents two such openings from overlapping in time. Tear-up and tear-down is on the order of seven milliseconds, a seemingly tiny increment when you compare it to the trillion-year span that falls within our custody. But when you slice a period of interest into fourteen-millisecond chunks, you run out of time fast. Each such span can only ever be touched by us once, connected to one other place and time of our choosing.

"Stasis Control thus has access to a theoretical maximum of 5.6 times 1021 slots across the totality of our history-but our legion of humanity comes perilously close, with a total of 2 times 10 slots across the totality of our history-but our legion of humanity comes perilously close, with a total of 2 times 1019 people. Many of the total available slots are reserved for data, relaying the totality of recorded human history to the Library-fully ninety-six percent of humanity lives in eras where ubiquitous surveillance or personal life-logging technologies have made the recording of absolute history possible, and we obviously need to archive their lifelines. Only the ur-historical prelude to Stasis, and periods of complete civilizational collapse and Reseeding, are not being monitored in exhaustive detail. people. Many of the total available slots are reserved for data, relaying the totality of recorded human history to the Library-fully ninety-six percent of humanity lives in eras where ubiquitous surveillance or personal life-logging technologies have made the recording of absolute history possible, and we obviously need to archive their lifelines. Only the ur-historical prelude to Stasis, and periods of complete civilizational collapse and Reseeding, are not being monitored in exhaustive detail.

"To make matters worse: in practice there are far fewer slots available for actual traffic, because we are not, as a species, well equipped for reacting in spans of less than a second. The seven-millisecond latency of a timegate is shorter by an order of magnitude than the usual duration of a gate used for transport.