"I want you to go to Mars. We have a project there that will be your cover story, salvaging a section of the fallen elevator cable. But while you're doing that, I'll be making arrangements to get you together with this person who has contacted me. You won't have to initiate anything. They'll make the move, and take you in. But look. In the beginning, I don't want you to let them know exactly exactly what you're trying to do. I want you to go to work on them. Find out who they are, and how extensive their operation is, and what they want. And how we might deal with them." what you're trying to do. I want you to go to work on them. Find out who they are, and how extensive their operation is, and what they want. And how we might deal with them."

"So I'll be a kind of-"

"A kind of diplomat."

"A kind of spy, I was going to say."

Fort shrugged. "It depends on who you're with. This project has to remain a secret. I deal with a lot of the other transnat leaders, and they're scared people. Perceived threats to the current order often get attacked quite brutally. And some of them already think Praxis is a threat. So for the time being there is a hidden arm to Praxis, and this Mars investigation has to be part of that. So if you join, you join the hidden Praxis. Think you can do it?"

"I don't know."

Fort laughed. "That's why I chose you for this mission, Randolph. You seem simple."

I am simple, Art almost said, and bit his tongue. Instead he said, "Why me?"

Fort regarded him. "When we acquire a new company, we review its personnel. I read your record. I thought you might have the makings of a diplomat."

"Or a spy."

"They are often different aspects of the same job."

Art frowned. "Did you bug my apartment? My old apartment?"

"No." Fort laughed again. "We don't do that. People's records are enough."

Art recalled the late-night viewing of one of their sessions.

"That and a session down here," Fort added. "To get to know you."

Art considered it. None of the Eighteen wanted this job. Nor the scholars, perhaps. Of course it was off to Mars, and then into some invisible world no one knew anything about, maybe for good. Some people might not find it attractive. But for someone at loose ends, maybe looking for new employment, maybe with a potential for diplomacy....

So all this had indeed proved to be a kind of interview process. For a job he hadn't even known existed. Mars Acquirer. Mars Acquisition Chief. Mars Mole. A Spy in the House of Ares. Amba.s.sador to the Mars Underground. Amba.s.sador to Mars. My oh my, he thought.

"So what do you say?"

"I'll do it," Art said.

William Fort didn't fool around. The moment Art agreed to take the Mars a.s.signment, his life speeded up like a video on fast forward. That night he was back in the sealed van, and then in the sealed jet, all alone this time, and when he staggered up the jetway it was dawn in San Francisco.

He went to the Dumpmines office, and made the round of friends and acquaintances there. Yes, he said again and again, I've taken a job on Mars. Salvaging a bit of the old elevator cable. Only temporary. The pay is good. I'll be back.

That afternoon he went home and packed. It took ten minutes. Then he stood groggily in the empty apartment. There on the stove-top was the frying pan, the only sign of his former life. He took the frying pan over to his suitcases, thinking he could fit it in and take it with him. He stopped over the cases, full and shut. He went back and sat down on the single chair, the frypan hanging from his hand.

After a while he called Sharon, hoping partly to get her answering machine, but she was home. "I'm going to Mars," he croaked. She wouldn't believe it. When she believed it she got angry. It was desertion pure and simple, he was running out on her. But you already threw me out, Art tried to say, but she had hung up. He left the frying pan on the table, lugged his suitcases down to the sidewalk. Across the street a public hospital that did the longevity treatment was surrounded by its usual crowd, people whose turn at the treatment was supposedly near, camping out in the parking lot to make sure nothing went awry. The treatments were guaranteed to all U.S. citizens by law, but the waiting lists for the public facilities were so long that it was a question whether one would survive to reach one's turn. Art shook his head at the sight, and flagged down a pedicab.

He spent his last week on Earth in a motel in Cape Canaveral. It was a lugubrious farewell, as Canaveral was restricted territory, occupied chiefly by military police, and service personnel who had extremely bad att.i.tudes toward the "late lamented," as they called those waiting for departure. The daily extravaganza of takeoff only left everyone either apprehensive or resentful, and in all cases rather deaf. People went around in the afternoons with ears ringing, repeating, What? What? What? To counteract the problem most of the locals had earplugs; they would be dropping plates on one's restaurant table while talking to people in the kitchen, and suddenly they'd glance at the clock and take earplugs out of their pocket and stuff them in their ears, and boom, off would go another Novy Energia booster with two shuttles strapped to it, causing the whole world to quake like jelly. The late lamented would rush out into the streets with hands over their ears to get another preview of their fate, staring up stricken at the biblical pillar of smoke and the pinpoint of fire arching over the Atlantic. The locals would stand in place chewing gum, waiting for the time-out to be over. The only time they showed any interest was one morning when the tides were high and news came that a group of party-crashers had swum up to the fence surrounding the town and cut their way inside, where security had chased them to the area of the day's launch; it was said some of them had been incinerated by takeoff, and this was enough to get some of the locals out to watch, as if the pillar of smoke and fire would look somehow different.

Then one Sunday morning it was Art's turn. He woke and dressed in the ill-fitting jumper provided, feeling as if he were dreaming. He got in the van with another man looking just as stunned as he felt, and they were driven to the launching compound and identified by retina, fingerprint, voice, and visual appearance; and then, without ever really having managed to think about what it all meant, he was led into an elevator and down a short tunnel into a tiny room where there were eight chairs somewhat like dentist's chairs, all of them occupied by round-eyed people, and then he was seated and strapped in and the door was shut and there was a vibrant roar under him and he was squished, and then he weighed nothing at all. He was in orbit.

After a while the pilot unbuckled and the pa.s.sengers did too, and they went to the two little windows to look out. Black s.p.a.ce, blue world, just like the pictures, but with the startling high resolution of reality. Art stared down at West Africa and a great wave of nausea rolled through every cell of him.

He was only just getting the slightest touch of appet.i.te back, after a timeless interval of s.p.a.ce sickness that apparently in the real world had clocked in at three days, when one of the continuous shuttles came bombing by, after swinging around Venus and aerobraking into an Earth-Luna orbit just slow enough to allow the little ferries to catch up to it. Sometime during his s.p.a.ce sickness Art and the other pa.s.sengers had transferred into one of these ferries, and when the time was right it blasted off in pursuit of the continuous shuttle. Its acceleration was even harder than the takeoff from Canaveral, and when it ended Art was reeling, dizzy, and nauseated again. More weightlessness would have killed him; he groaned at the very thought; but happily there was a ring in the continuous shuttle that rotated at a speed that gave some rooms what they called Martian gravity. Art was given a bed in the health center occupying one of these rooms, and there he stayed. He could not walk well in the peculiar lightness of Martian g; he hopped and staggered about, and he still felt bruised internally, and dizzy. But he stayed on just the right side of nausea, which he was thankful for even though it was not a very pleasant feeling in itself.

The continuous shuttle was strange. Because of its frequent aerobraking in the atmospheres of Earth, Venus, and Mars, it had somewhat the shape of a hammerhead shark. The ring of rotating rooms was located near the rear of the ship, just ahead of the propulsion center and the ferry docks. The ring spun, and one walked with head toward the centerline of the ship, feet pointing down at the stars under the floor.

About a week into their voyage Art decided to give weightlessness one more try, as the rotating ring was without windows. He went to one of the transfer chambers for getting from the rotating ring to the nonrotating parts of the ship; the chambers were on a narrow ring that moved with the g ring, but could slow down to match the rest of the ship. The chambers looked just like freight elevator cars, with doors on both sides; when you got in one and pushed the right b.u.t.ton, it decelerated through a few rotations to a stop, and the far door opened on the rest of the ship.

So Art tried that. As the car slowed, he began to lose weight, and his gorge began to rise in an exact correspondence. By the time the far door opened he was sweating and had somehow launched himself at the ceiling, where he hurt his wrist catching himself before hitting his head. Pain battled nausea, and the nausea was winning; it took him a couple of caroms to get to the control panel and hit the b.u.t.ton to get him moving again, and back into the gravity ring. When the far door closed he settled gently back to the floor, and in a minute Martian gravity returned, and the door he had come in through reopened. He bounced gratefully out, suffering no more than the pain of a sprained wrist. Nausea was far more unpleasant than pain, he reflected- at least certain levels of pain. He would have to get his outside view over the TVs.

He would not be lonely. Most of the pa.s.sengers and all of the crew spent the majority of their time in the gravity ring, which was therefore fairly crowded, like a full hotel in which most of the guests spent most of their time in the restaurant and bar. Art had seen and read accounts of the continuous shuttles that made them seem like flying Monte Carlos, with permanent residents made up of the rich and bored; a popular vid series had had just such a setting. Art's ship, the Ganesh Ganesh, was not like that. It was clear that it had been hurtling around the inner solar system for a good long time now, and always at full capacity; its interiors were getting shabby, and when restricted to the ring it seemed very small, much smaller than the impression one had of these kinds of ships from watching history shows about the Ares Ares. But the First Hundred had lived in about five times as much s.p.a.ce as the Ganesh's Ganesh's g ring, and the g ring, and the Ganesh Ganesh carried five hundred pa.s.sengers. carried five hundred pa.s.sengers.

Flight time, however, was only three months. So Art settled down and watched TV, concentrating on doc.u.mentaries about Mars. He ate in the dining room, which was decorated to look like one of the great ocean liners of the 1920s, and he gambled a bit in the casino, which was decorated to look like one of the Las Vegas casinos of the 1970s. But mostly he slept and watched TV, the two activities melting into each other so that he dreamed very lucidly about Mars, while the doc.u.mentaries took on a very surreal logic. He saw the famous videotapes of the Russell-Clayborne debate, and that night dreamed he was unsuccessfully arguing with Ann Clayborne, who, just as in the vids, looked like the farmer's wife in American Gothic American Gothic only more gaunt and severe. Another film, taken by a flying drone, also affected him deeply; the drone had dropped off the side of one of the big Marineris cliffs, and fallen for nearly a minute before pulling out and swooping low over the jumbled rock and ice on the canyon floor. Repeatedly in the following weeks Art dreamed of making that fall himself, and woke up just before impact. It appeared that parts of his unconscious mind felt that the decision to go had been a mistake. He shrugged at this, ate his meals, and practiced his walking. He was biding his time. Mistake or not, he was committed. only more gaunt and severe. Another film, taken by a flying drone, also affected him deeply; the drone had dropped off the side of one of the big Marineris cliffs, and fallen for nearly a minute before pulling out and swooping low over the jumbled rock and ice on the canyon floor. Repeatedly in the following weeks Art dreamed of making that fall himself, and woke up just before impact. It appeared that parts of his unconscious mind felt that the decision to go had been a mistake. He shrugged at this, ate his meals, and practiced his walking. He was biding his time. Mistake or not, he was committed.

Fort had given him an encryption system, and instructions to report back on a regular basis, but in transit he found there was very little to say. Dutifully he sent off a monthly report, each one the same: We're on our way. All seems well We're on our way. All seems well. There was never any reply.

And then Mars swelled up like an orange thrown at the TV screens, and soon after that they were there, crushed into their g couches by an extremely violent aerobraking, and then crushed again in their ferry's chairs; but Art came through these flattening decelerations like a veteran, and after a week in orbit, still rotating, they docked with New Clarke. New Clarke had only a very small gravity, which barely held people to the floor, and made Mars appear to be overhead. Art's s.p.a.ce sickness returned. And he had a two-day wait before his reservation for an elevator ride.

The elevator cars proved to be like slender tall hotels, and they ran their tightly packed human cargo down toward the planet over a period of five days, with no gravity to speak of until the last couple of days, when it got stronger and stronger, until the elevator car slowed and descended gently into the receiving facility called the Socket, just west of Sheffield on Pavonis Mons, and the g came to something like the g in the Ganesh Ganesh's g ring. But a week of s.p.a.ce sickness had left Art completely devastated, and as the elevator car opened, and they were guided out into something very like an airport terminal, he found himself scarcely able to walk, and amazed at how much nausea decreased one's desire to live. It was four months to the day since he had gotten the fax from William Fort.

The trip from the Socket into Sheffield proper was by subway, but Art would have been too miserable to notice a view even if there had been one. Wasted and unsteady, he tiptoed bouncily down a tall hallway after someone from Praxis, and collapsed thankfully on a bed in a small room. Martian g felt blessedly solid when he was lying down, and after a while he fell asleep.

When he woke he could not remember where he was. He looked around the little room, completely disoriented, wondering where Sharon had gone and why their bedroom had gotten so small. Then it came back. He was on Mars.

He groaned and sat up. He felt hot and yet detached from his body, and everything was pulsing slightly, though the room lights appeared to be functioning normally. There were drapes covering the wall opposite the door, and he stood and walked over, and opened them with a single pull.

"Hey!" he cried, leaping back. He woke up a second time, or so it felt.

It was like the view out an airplane window. Endless open s.p.a.ce, a bruise-colored sky, the sun like a blob of lava; and there far below stretched a flat rocky plain- flat and round, as it lay at the bottom of an enormous circular cliff- extremely circular, remarkably circular, in fact, for a natural feature. It was difficult to estimate how distant the far side of the cliff was. Features of the cliff were perfectly clear, but structures on the opposite rim were teensy; what looked like an observatory could have fit on a pin-head.

This, he concluded, was the caldera of Pavonis Mons. They had landed at Sheffield, so really there could be no doubt about it. Therefore it was some sixty kilometers across the circle to that observatory, as Art recalled from his video doc.u.mentaries, and five kilometers to the floor. And all of it completely empty, rocky, untouched, primordial- the volcanic rock as bare as if cooled the week before- nothing at all of humanity in it- no sign of terraforming. It must have looked exactly like this to John Boone, a half century before. And so... alien. And big big. Art had looked into the calderas of Etna and Vesuvius, while on vacation from Tehran, and those two craters were big by Terran standards, but you could have lost a thousand of them in this, this thing thing, this hole hole....

He closed the drapes and got slowly dressed, his mouth imitating the shape of the unearthly caldera.

A friendly Praxis guide named Adrienne, tall enough to be a Martian native but possessing a strong Australian accent, collected him and took him and half a dozen other new arrivals on a tour of the town. Their rooms turned out to be on the city's lowest level, though it wouldn't be lowest for long; Sheffield was in the process of burrowing downward these days, to give as many rooms as possible the view onto the caldera that had so disconcerted Art.

An elevator took them up nearly fifty stories, and let them out in the lobby of a shiny new office building. They walked out its big revolving doors and emerged on a wide gra.s.sy boulevard, and walked down it past squat buildings faced with polished stone and big windows, separated by narrow gra.s.sy side streets, and a great number of construction sites, as many buildings were still in various stages of completion. It was going to be a handsome town, the buildings mostly three and four stories tall, getting taller as they moved south, away from the caldera rim. The green streets were crowded with people, and the occasional small tram running on narrow tracks set in the gra.s.s; there was a general air of bustle and excitement, caused no doubt by the arrival of the new elevator. A boom town.

The first place Adrienne took them was across a boulevard to the caldera rim. She led the seven newcomers out into a thin curving park, to the nearly invisible tenting that encased the town. The transparent fabrics were held in place by equally transparent geodesic struts, anch.o.r.ed in a chest-high perimeter wall. "The tenting has to be stronger than usual up here on Pavonis," Adrienne told them, "because the atmosphere outside is still extremely thin. It'll always be thinner than the lowlands, by a factor of ten."

She led them out into a viewing blister in the tent wall and, looking down between their feet, they could see through the blister's transparent deck, straight down onto the caldera floor some five kilometers below them. People exclaimed in delicious fright, and Art bounced on the clear floor uneasily. The width of the caldera was coming into perspective for him; the north rim was just about as far away as Mount Tamalpais and the Napa hills when one descended into the San Jose airport. That was no extraordinary distance. But the depth below, the depth; over five kilometers, or about twenty thousand feet twenty thousand feet. "Quite a hole!" Adrienne said.

Mounted telescopes and display plaques with map drawings enabled them to spot the previous version of Sheffield, now lying on the caldera floor. Art had been wrong about the caldera's untouched primeval nature; an insignificant pile of cliff-bottom talus, with some shiny dots in it, was in fact the ruins of the original city.

Adrienne described with great gusto the destruction of the town in 2061. The falling elevator cable had, of course, crushed the suburbs east of its socket in the very first moments of the fall. But then the cable had wrapped all the way around the planet, delivering a ma.s.sive second blow to the south side of town, a blow which had caused an undiscovered fault in the basalt rim to give way. About a third of the town had been on the wrong side of this fault, and had fallen the five kilometers to the caldera floor. The remaining two-thirds of the town had been knocked flat. Luckily the occupants had mostly evacuated in the four hours between the detachment of Clarke and the second coming of the cable, so loss of life had been minimized. But Sheffield had been utterly destroyed.

For many years after that, Adrienne told them, the site had lain abandoned, a wreck like so many other towns after the unrest of '61. Most of those other towns had been left in ruins, but Sheffield's location remained the ideal place for tethering a s.p.a.ce elevator, and when Subarashii began organizing the in-s.p.a.ce construction of a new one in the late 2080s, construction on the ground had rapidly followed. A detailed areological investigation had found no other faults in the southern rim, which had justified rebuilding right on the edge, on the same site as before. Demolition vehicles had cleared the wreckage of the old town, shoving most of it over the rim, and leaving only the easternmost section of town, around the old socket, as a kind of monument to the disaster- also as the central element of a little tourist industry, which had clearly been an important part of the town's income in the fallow years before an elevator had been reinstalled.

Adrienne's next point on the tour led them out to see this preserved bit of history. They took a tram to a gate in the east wall of the tent, and then walked through a clear tube into a smaller tent, which covered the blasted ruins, the concrete ma.s.s of the old cable facility, and the lower end of the fallen cable. They walked a roped path that had been cleared of wreckage, staring curiously at the foundations and twisted pipes. It looked like the results of saturation bombing.

They came to a halt under the b.u.t.t end of the cable, and Art observed it with professional interest. The big cylinder of black carbon filaments looked nearly undamaged by the fall, although admittedly this was the part that had hit Mars with the least force. The end had jammed down into the Socket's big concrete bunker, Adrienne said, then been dragged a couple of kilometers as the cable had fallen down the eastern slope of Pavonis. That wasn't that much of a beating for material designed to withstand the pull of an asteroid swinging beyond the areosynchronous point.

And so it lay there, as if waiting to be straightened up and put back in place: cylindrical, two stories high, its black bulk encrusted by steel tracks and collars and the like. The tent only covered a hundred meters or so of it; after that it ran on uncovered, east along the wide rounded plateau of the rim, until it disappeared over the rim's outer edge, which formed their horizon- they could see nothing of the planet below. But out away from the town they could see better than ever that Pavonis Mons was huge- its rim alone was an impressive expanse, a doughnut of flat land perhaps thirty kilometers wide, from the abrupt inner edge of the caldera to the more gradual drop-off down the volcano's flanks. Nothing of the rest of Mars could be seen from their vantage point, so it seemed they stood on a high circular ring world, under a dark lavender sky.

Just to the south of them, the new Socket was like a t.i.tanic concrete bunker, the new elevator cable rising out of it like an elevator cable, standing alone as if in some version of the Indian rope trick, thin and black and straight as a plumb line dropping down from heaven- visible for only a few tall skysc.r.a.pers' worth of height, at most- and, given the wreckage they stood in, and the immensity of the volcano's bare rocky peak, as fragile-looking as if it were a single carbon nanotube filament, rather than a bundle of billions of them, and the strongest structure ever made. "This is weird," Art said, feeling hollow and unsettled.

After their tour of the ruins, Adrienne took them back to a plaza cafe in the middle of the new town, where they had lunch. Here they could have been in the heart of a fashionable district in any town anywhere- it could have been Houston or Tbilisi or Ottawa, in some neighborhood where a lot of noisy construction marked a fresh prosperity. When they went back to their rooms, the subway system was likewise familiar to the eye- and when they got out, the halls of the Praxis floors were those of a fine hotel. All utterly familiar- so much so that it was again a shock to walk into his room and look out the window and see the awesome sight of the caldera- the bare fact of Mars, immense and stony, seeming to exert a kind of vacuum pull on him through the window. And in fact if the windowpane were to break the pressure blowout would certainly suck him immediately into that s.p.a.ce; an unlikely eventuality, but the image still gave him an unpleasant thrill. He closed the drapes.

And after that he kept the drapes closed, and tended to stay on the side of his room away from the window. In the mornings he dressed and left the room quickly, and attended orientation meetings run by Adrienne, which were joined by a score or so of new arrivals. After lunching with some of them, he spent his afternoons touring the town, working earnestly on his walking skills. One night he thought to send a coded report off to Fort: On Mars, going through orientation. Sheffield is a nice town. My room has a view On Mars, going through orientation. Sheffield is a nice town. My room has a view. There was no reply.

Adrienne's orientation took them to a number of Praxis buildings, both in Sheffield and up the east rim, to meet people in the transnational's Martian operations. Praxis had much more of a presence on Mars than it did in America. During Art's afternoon walks he tried to gauge the relative strengths of the transnationals, just by the little plates on the sides of the buildings. All the biggest transnats were there- Armscor, Subarashii, Oroco, Mitsubishi, The 7 Swedes, Sh.e.l.lalco, Gentine, and so on- each occupying a complex of buildings, or even entire neighborhoods of the town. Clearly they were all there because of the new elevator, which had made Sheffield once again the most important city on the planet. They were pouring money into the town, building submartian subdivisions, and even entire tent suburbs. The sheer wealth of the transnats was obvious in all the construction- and also, Art thought, in the way people moved: there were a lot of people bouncing around the streets just as clumsily as he was, newcomer businessmen or mining engineers or the like, concentrating with furrowed brow on the act of walking. It was no great trick to pick out the tall young natives, with their catlike coordination; but they were in a distinct minority in Sheffield, and Art wondered if that was true everywhere on Mars.

As for architecture, s.p.a.ce under the tent was at a premium, and so the completed buildings were bulky, often cubical, occupying their lots right out to the street and right up to the tent. When all the construction was finished there would only be a network of ten triangular plazas, and the wide boulevards, and the curving park along the rim, to keep the town from being a continuous ma.s.s of squat skyc.r.a.pers, faced with polished stone of various shades of red. It was a city built for business.

And it looked to Art like Praxis was going to get a good share of that business. Subarashii was the general contractor for the elevator, but Praxis was supplying the software as they had for the first elevator, and also some of the cars, and part of the security system. All these allocations, he learned, had been made by a committee called the United Nations Transitional Authority, supposedly part of the UN, but controlled by the transnats; and Praxis had been as aggressive on this committee as any of the others. William Fort might have been interested in bioinfrastructure, but the ordinary kind was obviously not outside Praxis's field of operations; there were Praxis divisions building water supply systems, train pistes, canyon towns, wind-power generators, and areothermal plants. The latter two were widely regarded as marginal endeavors, as the new orbiting solar collectors and a fusion plant in Xanthe were turning out so well, not to mention the older generation of integral fast reactors. But local energy sources were the specialty of the Praxis subsidiary Power From Below, and so that was what they did, working hard in the outback.

Praxis's local salvage subsidiary, the Martian equivalent of Dumpmines, was called Ouroborous, and like Power From Below it was also fairly small. In truth, as the Ouroborous people were quick to tell Art when they met one morning, there was not a large garbage output on Mars; almost everything was recycled or put to use in creating agricultural soil, so each settlement's dump was really more of a holding facility for miscellaneous materials, awaiting their particular reuse. Ouroborous therefore got its business by finding and collecting the garbage or sewage that was somehow recalcitrant- toxic, or orphaned, or simply inconvenient- and then finding ways to turn it to use.

The Ouroborous team in Sheffield occupied one floor of Praxis's downtown skysc.r.a.per. The company had gotten its start excavating the old town, before the ruins had been so unceremoniously shoved over the side. A man named Zafir headed the fallen cable salvage project, and he and Adrienne accompanied Art to the train station, where they got on a local train and took a short ride around to the east rim, to a line of suburb tents. One of the tents was the Ouroborous storage facility, and just outside it, among many other vehicles, was a truly gigantic mobile processing factory, called the Beast. The Beast made a SuperRathje look like a compact car- it was a building rather than a vehicle, and almost entirely robotic. Another Beast was already out processing the cable in west Tharsis, and Art was slated to go out and make an on-site inspection of it. So Zafir and a couple of technicians showed him around the inside of the training vehicle, ending up in a wide compartment on the top floor, where there were living quarters for any humans who might be visiting.

Zafir was enthusiastic about what the Beast out on west Tharsis had found. "Of course just recovering the carbon filament and the diamond gel helixes gives us a basic income stream," he said. "And we are doing well with some brecciated exotics metamorphosed in the final hemisphere of the fall. But what you'll be interested in are the buckyb.a.l.l.s." Zafir was an expert in these little carbon geodesic spheres called buckminsterfullerenes, and he waxed enthusiastic: "Temperatures and pressures in the west Tharsis zone of the fall turned out to be similar to those used in the arc-reactor-synthesis method of making fullerenes, and so there's a hundred-kilometer stretch out there where the carbon on the bottom side of the cable consists almost entirely of buckyb.a.l.l.s. Mostly sixties, but also some thirties, and a variety of superbuckies." And some of the superbuckies had formed with atoms of other elements trapped inside their carbon cages. These "full fullerenes" were useful in composite manufacturing, but very expensive to make in the lab because of the high amounts of energy required. So they were a nice find. "It's sorting out the various superbuckies where your ion chromatography will come in."

"So I understand," Art said. He had done work with ion chromatography during a.n.a.lyses in Georgia, and this was his ostensible reason for being sent into the outback. So over the next few days Zafir and some Beast technicians trained Art in dealing with the Beast, and after these sessions they had dinner together at a small restaurant in the suburb tent on the east rim. After sunset they had a great view of Sheffield, some thirty kilometers around the curve of the rim, glowing in the twilight like a lamp perched on the black abyss.

As they ate and drank, the conversation seldom turned to the matter of Art's project, and, considering it, Art decided that this was probably a deliberate courtesy on his colleagues' part. The Beast was fully self-operating, and though there were some problems to be solved in sorting out the recently discovered full fullerenes, there must have been local ion chromatographers who could have done the job. So there was no obvious reason why Praxis should have sent Art up from Earth to do it, and there had to be something more to his story. And so the group avoided the topic, saving Art the embarra.s.sment of lies, or awkward shrugs, or an explicit appeal to confidentiality.

Art would have been uncomfortable with any of these dodges, so he appreciated their tact. But it put a certain distance in their conversations. And he seldom saw the other Praxis newcomers, outside of orientation meetings; and he didn't know anyone else in town, or elsewhere on the planet. So he was a little lonely, and the days pa.s.sed in an increasing sense of uneasiness, even oppression. He kept the drapes closed on his window view, and ate in restaurants away from the rim. It began to feel a bit too much like the weeks on the Ganesh Ganesh, which he now understood to have been a miserable time. Sometimes he had to fend off the feeling that it had been a mistake to come.

And so after their last orientation lecture, at a reception luncheon in the Praxis building, he drank more than was his custom, and took a few inhalations from a tall canister of nitrous oxide. Inhalation of recreational drugs was a local custom, fairly big among Martian construction workers, he had been told, and there were even little canisters of various gases for sale from dispensers in some public men's rooms. Certainly the nitrous added a certain extra bubbly quality to the champagne; it was a nice combination, like peanuts and beer, or ice cream and apple pie.

Afterward he walked down the streets of Sheffield bouncing erratically, feeling the nitrous champagne as a kind of antigravitational effect, which, added to the Martian baseline, made him feel altogether too light. Technically he weighed about forty kilos, but as he walked along it felt more like five. Very strange, even unpleasant. Like walking on b.u.t.tered gla.s.s.

He nearly ran into a young man, slightly taller than him- a black-haired youth, as slender as a bird and as graceful, who quickly veered away from him and then steadied him with a hand to his shoulder, all in one smooth flow of movement.

The youth looked him in the eye. "Are you Arthur Randolph?"

"Yes," Art said, surprised. "I am. And who are you?"

"I'm the one who contacted William Fort," the young man said.

Art stopped abruptly, swaying to get back over his feet. The young man held him upright with a gentle pressure, his hand hot on Art's upper arm. He regarded Art with a direct look, a friendly smile. Perhaps twenty-five, Art judged, perhaps younger- a handsome youth with brown skin and thick black eyebrows, and eyes that were slightly Asian, set wide over prominent cheekbones. An intelligent look, full of curiosity and a kind of magnetic quality, hard to pin down.

Art took to him instantly, for no reason he could tell. It was just a feeling. "Call me Art," he said.

"And I am Nirgal," the youth said. "Let's go down to Overlook Park."

So Art walked with him down the gra.s.sy boulevard to the park on the rim. There they strolled the path next to the coping wall, Nirgal helping Art with his drunken turns by frankly seizing his upper arm and steering him. His grasp had an electric penetrating quality to it, and was really very warm, as if the youth had a fever, though there was no sign of it in his dark eyes.

"Why are you here?" Nirgal asked- and his voice, and the look on his face, made the question into something other than a superficial inquiry. Art checked his response, thought about it.

"To help," he said.

"So you will join us?"

Again the youth somehow made it clear that he meant something different, something fundamental.

And Art said, "Yes. Anytime you like."

Nirgal smiled, a quick delighted grin that he only partly overmastered before he said, "Good. Very good. But look, I'm doing this on my own. Do you understand? There are people who wouldn't approve. So I want to slip you in among us, as if it were an accident. That's okay with you?"

"That's fine." Art shook his head, confused. "That's how I was planning on doing it anyway."

Nirgal stopped by the observation bubble, took Art's hand and held it. His gaze, so open and unflinching, was contact of another kind. "Good. Thanks. Just keep doing what you're doing, then. Go out on your salvage project, and you'll be picked up out there. We'll meet again after that."

And he was off, walking across the park in the direction of the train station, moving with the long graceful lope that all the young natives seemed to have. Art stared after him, trying to remember everything about the encounter, trying to put his finger on what had made it so charged. Simply the look on the youth's face, he decided- not just the unself-conscious intensity one sometimes saw on the faces of the young, but more- some humorous power. Art remembered the sudden grin unleashed when Art had said (had promised) that he would join them. Art grinned himself.

When he got back to his room, he walked right to the window and opened the drapes. He went over to the table by his bed, and sat and turned on his lectern, and looked up Nirgal Nirgal. No person listed by that name. There was a Nirgal Vallis, between Argyre Basin and Valles Marineris. One of the best examples of a water-carved channel on the planet, the entry said, long and sinuous. The word was the Babylonian name for Mars.

Art went back to the window and pressed his nose against the gla.s.s. He looked right down the throat of the thing, into the rocky heart of the monster itself. Horizontal banding of the curved walls, the broad round plain so far below, the sharp edge where it met the circular wall- the infinite shadings of maroon, rust, black, tan, orange, yellow, red- everywhere red, all the variations of red.... He drank it in, for the first time unafraid. And as he looked down this enormous coring into the planet, a new feeling leaped into him to replace the fear, and he shivered and hopped in place, in a little dance. He could handle the view. He could handle the gravity. He had met a Martian, a member of the underground, a youth with a strange charisma, and he would be seeing more of him, more of all of them.... He was on Mars. on Mars.

And a few days later he was on the west slope of Pavonis Mons, driving a small rover down a narrow road that paralleled a band of disturbed volcanic rubble, with what looked like a cog railway track running right down it. He had sent a final coded message to Fort, telling him that he was taking off, and had gotten the only reply of his journey so far: Have a nice trip. Have a nice trip.

The first hour of his drive held what everyone had told him would be its most spectacular sight: going over the western rim of the caldera, and starting down the outer slope of the vast volcano. This occurred about sixty kilometers west of Sheffield. He drove over the southwest edge of the vast rim plateau, and started downhill, and a horizon appeared very far below, and very far away- a slightly curved hazy white bar, like the view of Earth as seen from a s.p.a.ce plane's window- which made sense, as the peak of Pavonis was about eighty-five thousand feet above Amazonis Planitia. So it was a huge view, the most forcible reminder possible of the stupendous height of the Tharsis volcanoes. And he had a great view of Arsia Mons at that moment, in fact, the southernmost of the three volcanoes lined up on Tharsis, bulking over the horizon to his left like a neighboring world. And what looked like a black cloud, over the far horizon to the northwest, could very possibly be Olympus Mons itself!

So the first day's drive was all downhill, but Art's spirits remained high. "Toto, there is no chance no chance we are in Kansas anymore. We're... we are in Kansas anymore. We're... off off to see the to see the wizard! wizard! The wonderful wizard of Mars!" The wonderful wizard of Mars!"

The road paralleled the fall line of the cable. The cable had hit the west side of Tharsis with a tremendous impact, not as great as during the final wrap, of course, but enough to create the interesting superbuckies Art had been sent out to investigate. The Beast he was going down to meet had already salvaged the cable in this vicinity, however, and the cable was almost entirely gone; the only thing left of it was a set of old-fashioned-looking train tracks, with a third cog rail running down the middle. The Beast had made these tracks out of carbon from the cable, and then used other parts of the cable, and magnesium from the soil, to make little self-powered cog rail mining cars, which then carried salvage cargo back up the side of Pavonis to the Ouroborous facilities in Sheffield. Very neat, Art thought as he watched a little robot car roll past him in the opposite direction, up the tracks toward the city. The little train car was black, squat, powered by a simple motor engaging the cog track, filled with a cargo that was no doubt mostly carbon nanotube filaments, and capped on top by a big rectangular block of diamond. Art had heard about this in Sheffield, and so was not surprised to see it. The diamond had been salvaged from the double helixes strengthening the cable, and the blocks were actually much less valuable than the carbon filament stored underneath them- basically a kind of fancy hatch door. But they did look nice.

On the second day of his drive, Art got off the immense cone of Pavonis, and onto the Tharsis bulge proper. Here the ground was much more littered than the volcano's side had been with loose rock, and meteor craters. And down here, everything was blanketed with a drift of snow and sand, in a mix that looked like equal shares of both. This was the firn slope of west Tharsis, an area where storms coming in from the west frequently dumped loads of snow, which never melted but instead built up year by year, packing down the snow on the bottom. So far the pack consisted only of crushed snow, called firn, but after more years of compaction the lowest layers would be ice, and the slopes glaciers.

Now the slopes were still punctuated by big rocks sticking out of the firn, and small crater rings, the craters mostly less than a kilometer across, and looking as fresh as if they had been blasted the day before, except for the sandy snow now filling them.

When he was still many kilometers away, Art caught sight of the Beast salvaging the cable. The top of it appeared over the western horizon, and over the next hour the rest of it reared into view. Out on the vast empty slope it seemed somewhat smaller than its twin up in East Sheffield, at least until he drove under its flank, when once again it became clear that it was as big as a city block. There was even a square hole in the bottom of one side which looked for all the world like the entrance to a parking garage. Art drove his rover right at this hole- the Beast was moving at three kilometers a day, so it was no trick to hit it- and once inside, he drove up a curving ramp, following a short tunnel into a lock. There he spoke by radio to the Beast's AI, and doors behind his rover slid shut, and in a minute he could simply get out of his car, and go over to an elevator door, and take an elevator up to the observation deck.