"That's always the way with disasters," I said.
"What?"
"They're never bad news for everyone. Something nasty always rises to the top."
As we descended further I thought about cover stories and camouflage. I hadn't given much thought to either, but-weapons and logistics aside-that was the way I usually operated, preferring to adapt to my surroundings as I found them, rather than to plan things in advance. But what about Reivich? He couldn't have known about the plague, which meant that any plans he'd formulated would have been in disarray as soon as he learned what had happened. But there was a vital difference: Reivich was an aristocrat, and they had webs of influence which reached between worlds, often based on familial ties which reached back centuries. It was possible-likely, even-that Reivich had connections amongst Chasm City's élite.
Those connections would have been useful to him even if he hadn't managed to contact them before his arrival. But they'd have been even more useful if he'd been able to signal them while he was on his way here, forewarning them. A lighthugger moved at nearly the speed of light, but it had to speed up and slow down at either end of its journey. A radio signal from Sky's Edge-sent just before the Orvieto 's departure-would have reached Yellowstone a year or two in advance of the ship itself, giving his allies that much time to prepare for his arrival.
Or perhaps he had no allies. Or they existed, but the message had never got through, lost in the confusion that was the system's communications net and condemned to bounce endlessly between malfunctioning network nodes. Or perhaps there just hadn't been time to arrange for a message to be sent at all, or it hadn't crossed his mind.
I'd have liked to have drawn comfort from any of those possibilities, but the one thing I never counted on was having luck on my side.
It was generally simpler that way.
I looked out the window again, seeing Chasm City for the first time as the clouds parted, and thought: he's down there, somewhere . . . waiting and knowing . But even then the city was too large to take in, and I felt a crushing sense of the enormity of the task that lay ahead of me. Give up now, I thought; it's impossible. You'll never find him.
But then I remembered Gitta.
The city nestled within a wide, jagged crater wall, sixty kilometres from side to side, and nearly two kilometres high at its tallest point. When the first explorers arrived here, they had sought shelter from Yellowstone's winds within the crater, building flimsy, air-filled structures that would have survived five minutes in the true badlands. But they'd also been lured by the chasm itself: the deep, sheer-sided, mistenshrouded gully at the geometric centre of the crater.
The chasm belched perpetual warm gas, one of the outlets for the tectonic energy pumped into the core during the encounter with the gas giant. The gas was still poisonous, but much richer in free oxygen, water vapour and other trace gases than any comparable outgassing anywhere on Yellowstone's surface. The gas still needed to be filtered through machinery before it could be breathed, but that process was much simpler than it would have been elsewhere, and the scalding heat could be used to drive immense steam turbines, supplying as much energy as any burgeoning colony could use. The city had sprawled across the entire level surface of the crater, surrounding the chasm at its heart and spilling some way into its depths. Structures were perched on perilous ledges hundreds of metres below the chasm's lip, connected by elevators and walkways.
Most of the city, however, lay under a vast toroidal dome, encircling the chasm. Quirrenbach told me the locals called it the Mosquito Net. Technically, it was actually eighteen individual domes, but because they were merged it was hard to tell where one ended and another began. The surface hadn't been cleaned in seven years and was now stained in filthy, near-opaque shades of brown and yellow. It was largely accidental that some areas of the dome remained clean enough to reveal the city beneath them. From the behemoth, it looked almost normal: a phenomenal mass of immensely tall buildings compressed into festering urban density, like a glimpse into the innards of a fantastically complex machine. But there was something queasily wrong about those buildings; something sick about their shapes, contorted into forms no sane architect would have chosen. Above ground, they branched and re-branched, merging into a single bronchial mass. Except for a sprinkling of lights at their upper and lower extremities-strewn through the bronchial mass like lanterns-the buildings were dark and dead-looking.
"Well, you know what this means," I said.
"What?"
"They weren't kidding. It wasn't a hoax."
"No," Quirrenbach said. "They most certainly weren't. I also foolishly allowed myself to entertain that possibility; thinking that even after what had become of the Rust Belt, even after the evidence I had seen with my own eyes, the city itself might be intact, a reclusive hermit hoarding its riches away from the curious."
"But there's still a city," I said. "There are still people down there; still some kind of society."
"Just not quite the one we were expecting."
We skimmed low over the dome. The structure was a sagging geodesic drapery of latticed metal and structural diamond stretching for kilometres, as far into the brown caul of the atmosphere as it was possible to see. Tiny teams of suited repair workers were dotted across the dome like ants, their labours revealed by the intermittent sparks of welding torches. Here and there I saw gouts of grey vapour streaming from cracks in the dome, internal air freezing as it hit Yellowstone's atmosphere, high above the crater's thermal trap. The buildings below reached almost to the underside of the dome itself, groping up like arthritic fingers. Black strands stretched between those painfully swollen and crooked digits; for all the world like the last tracery of gloves which had rotted almost away. Lights were clumped near the tips of those fingers, reaching in long meandering filaments along the thickest webs which bridged them. Now that we were closer I saw that there was a finer tracery altogether, the buildings enveloped in a convoluted tangle of fine dark filaments as if delirious spiders had tried to fashion webs between them. What they had produced was an incoherent mass of dangling threads, lights moving through it along drunken trajectories.
I remembered what the welcome message aboard the Strelnikov had told me about the Melding Plague. The transformations had been extraordinarily rapid-so rapid, in fact, that the shifting buildings had killed a great many people in ways far cruder than the plague itself would have done. The buildings had been engineered to repair themselves and reshape themselves according to architectural whims imposed by democratic will-the populace having only to wish a building to alter its shape in sufficient numbers for the building to obey-but the changes wrought by the plague had been uncontrolled and sudden, more like a series of abrupt seismic shifts. That was the hidden danger of a city so Utopian in its fluidity that it could be reshaped time and again, frozen and melted and refrozen like an ice-sculpture. No one had told the city that there were people living within it, who might be crushed once it began to shape itself. Many of the dead were still down there, entombed in the monstrous structures which now filled the city.
Then Chasm City was no longer beneath us, but the toothed edge of the crater wall; the behemoth slicing expertly through a notch in the rim which looked only just wide enough to accommodate it.
Ahead I could see a huddle of armoured structures near one edge of a butterscotch-coloured lake. The behemoth lowered itself towards the lake, the scream of its thrusters audible now as it fought to hold itself at this altitude against its natural tendency to float upwards.
"Disembarkation time," Quirrenbach said. He got up from his seat, indicating a general flow of people across the lobby.
"Where are they all going?"
"To the drop capsules."
I followed him across the lobby, where a dozen sets of spiral stairs led to the disembarkation level, a whole deck below. People were waiting by glass airlocks to board teardrop-shaped capsules, dozens of them which were slowly being pushed forward along guideways.
At the front, the capsules slid down a short ramp which was jutting from the behemoth's belly, before falling the rest of the distance-two or three hundred metres-and splashing into the lake.
"You mean this thing doesn't actually land?"
"Good heavens, no." Quirrenbach smiled at me. "They wouldn't risk landing. Not these days."
Our drop capsule slid from the behemoth's belly. There were four of us in it: Quirrenbach, myself and two other passengers. The other two were engaged in an animated conversation about a local celebrity called Voronoff, but they spoke Norte with such a strong local accent that I could only follow about one word in three. They were completely unfazed by the experience of dropping from the behemoth; even when we plunged deep into the lake and appeared in some danger of not bobbing to the surface. But then we did, and because the drop capsule's skin was glassy, I could see other capsules bobbing around us.
Two giant machines strode across the lake to receive us. They were tripods, rising high above us on skeletal, pistonned mechanical legs. With cranelike appendages they began to collect the floating capsules and deposit each in a collecting net stowed beneath the body of each tripod. I could see a driver perched at the top of each machine, tiny inside a pressurised cabin, working levers furiously.
The machines walked to the lake's edge and emptied their catches onto a moving belt which fed into one of the buildings I'd seen from the behemoth.
Inside, we were passed into a pressurised reception chamber where the pods were removed from the belt and opened by bored-looking workers. Empty pods were shuttling around to an embarkation area similar to the one aboard the behemoth, where passengers waited with luggage. I presumed they'd be carried out to the middle of the lake by the tripods, which would then loft each pod high enough up for the behemoth to grab it.
Quirrenbach and I left our pod and followed the flow of passengers from the reception chamber through a warren of cold, dim tunnels. The air tasted stale, as if each breath had already been through a few lungs before it reached my own. But it was breathable, and the gravity not noticeably heavier than in the Rust Belt habitat.
"I don't know quite what I was expecting," I said. "But this wasn't it. No welcoming signs; no visible security; nothing. It makes me wonder what the immigration and customs section will be like."
"You don't have to wonder," Quirrenbach said. "You've just left it."
I thought about the diamond gun I'd given Amelia, secure in the knowledge that there was no way I would be able to take it with me to Chasm City.
"That was it?"
"Think about it. You'd find it exceedingly difficult to bring anything into Chasm City which wasn't already there. There's no point checking for weapons-they've got enough of them already, so what difference would one more make? They'd be far more likely to confiscate whatever you had and offer you part-exchange on an upgrade. And there's no point screening for diseases. Too complicated, and you're far more likely to catch something than bring something into the city. A few nice foreign germs might actually do us some good."
"Us?"
"Them. Slip of the tongue."
We passed into a well-lit area with wide windows overlooking the lake. The behemoth was being loaded with capsules, the dorsal surface of the manta-like machine still bright with the thrusters it had to burn to hold this position. Each pod was sterilised by being passed through a ring of purple flame before being accepted into the behemoth's belly. Maybe the city didn't care what came into it, but the outside universe certainly seemed to care what left it.
"I suppose you have some idea how we get to the city from here?"
"There's really only one way, I gather, and that's the Chasm City Zephyr."
Quirrenbach and I brushed past a palanquin, moving slowly down the next connecting tunnel. The upright box was patterned in bas-relief black, showing scenes from the city's vainglorious past. I risked a glance back as we overtook the slow-moving machine and my gaze met the fearful eyes of the hermetic sitting within: face pale behind thick green glass.
There were walking servitors carrying luggage, but there was something primitive about them. They were not sleek intelligence machines, but clunking, error-prone robots with about as much sentience as a dog. There were no genuinely clever machines left now, outside of the orbital enclaves where such things were still possible. But even the crude servitors that remained were obviously valued: signs of residual wealth.
And then there were the wealthy themselves, those travelling without the sanctuary of palanquins. I presumed none of these people had implants of any great complexity; certainly nothing that might be susceptible to plague spore. They moved nervously, in hurried packs, surrounding themselves with servitors.
Ahead the tunnel widened into an underground cavern, dimly lit by hundreds of flickering lamps burning in sconces. There was a steady warm breeze blowing through it, carrying a stench of machine oil.
And something enormous and bestial waited in the cavern.
It rode four sets of double rails arranged around it at intervals of ninety degrees: one set below the machine, one above and one on either side. The rails themselves were supported by a framework of skeletal braces, though at either end of the cavern they vanished into circular tunnels where they were anchored to the walls themselves. I couldn't help but think of the trains in the Santiago which had featured in one of Sky's dreams, braced within a similar set of rails-even though those rails had only been guidance ways for induction fields.
This wasn't like that.
The train itself was constructed with a four-way symmetry. At the centre was a cylindrical core tipped with a bullet-shaped prow and a single Cyclopean headlight. Jutting from this core were four separate double rows of enormous iron wheels, each of which contained twelve axles and was locked onto one of the pairs of rail lines. Three pairs of huge cylinders were interspersed along each set of twelve main wheels, each connected to four sets of wheels by a bewildering arrangement of gleaming pistons and thigh-thick greased articulated cranks. A mass of pipe-runs snaked all around the machine; whatever symmetry or elegance of design it might have had was ruined by what appeared to be randomly placed exhaust outlets, all of which were belching steam up towards the cavern's ceiling. The machine hissed like a dragon whose patience was wearing fatally thin. It seemed worryingly alive.
Behind was a string of passenger cars built around the same four-fold symmetry, engaging with the same rails.
"That's the . . . ?"
". . . Chasm City Zephyr," Quirrenbach said. "Quite a beast, isn't she?"
"You're telling me that thing actually goes somewhere?"
"It wouldn't make much sense if it didn't." I gave him a look so he continued, "I heard that they used to have magnetic levitation trains running into Chasm City and out to the other colonies. They had vacuum tunnels for them. But they must have stopped working properly after the plague."
"And they thought replacing them with this was a good idea?"
"They didn't have much choice. I don't think anyone needs to get anywhere very quickly nowadays, so it doesn't matter that the trains can't run at the supersonic speeds they used to attain. A couple of hundred kilometres per hour is more than sufficient, even for journeys out to the other settlements."
Quirrenbach started walking towards the back of the train where ramps led up to the passenger cars.
"Why steam?"
"Because there aren't any fossil fuels on Yellowstone. Some nuclear generators still work, but, by and large, the chasm itself is about the only useful energy source around here. That's why a lot of the city runs on steam pressure these days."
"I still don't buy it, Quirrenbach. You don't jump back six hundred years just because you can't use nanotechnology any more."
"Maybe you do. After the plague hit, it affected a lot more than you'd think. Almost all manufacturing had been done by nano for centuries. Materials production; shaping-it all suddenly got a lot cruder. Even things which didn't use nano themselves had been bui
lt by nano; designed with incredibly fine tolerances. None of that stuff could be duplicated any more. It wasn't just a question of making do with things which were slightly less sophisticated. They had to go right back before they reached any kind of plateau from which they could begin rebuilding. That meant working with crudely forged metals and metalworking techniques. And remember that a lot of the data relating to these things had been lost as well. They were fumbling around in the blind. It was like someone from the twenty-first century trying to work out how to make a mediaeval sword without knowing anything about metallurgy. Knowing that something was primitive didn't necessarily mean it was any easier to rediscover."
Quirrenbach paused to catch his breath, standing beneath a clattering destination board. It showed departures to Chasm City, Ferrisville, Loreanville, New Europa and beyond, but only about one train a day was leaving to anywhere other than Chasm City.
"So they did the best they could," Quirrenbach said. "Some technology had survived the plague, of course. That's why you'll still see relics, even here-servitors, vehicles-but they tend to be owned by the rich. They've got all the nuclear generators, and the few antimatter power-plants left in the city. Down in the Mulch it'll be a different story, I think. It'll be dangerous, too."
While he talked I looked at the destination board. It would have made my job a lot easier if Reivich had taken a train to one of the smaller settlements, where he would have been both conspicuous and trapped, but I thought the chances were good that he'd have taken the first train to Chasm City.
Quirrenbach and I paid our fares and boarded the train. The carriages strung behind the locomotive looked much older than the rest of it, and therefore much more modern, salvaged from the old levitating train and mounted on wheels. The doors irised shut, and then the whole procession clanked into motion, creeping forward at a walking pace and then gathering speed laboriously. There was an intermittent squeal of slipping wheels, and then the ride became smoother, steam billowing past us. The train threaded its way through one of the narrow-bored tunnels faced with an enormous irising door, and then we passed through a further series of pressure locks, until we must have been moving through near-vacuum.
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