The Arrows of Time: Orthogonal Book Three (43 page)

Generations of scientists had uncovered the details she needed to quantify the effect: she was mining the entire intellectual legacy of the
Peerless
. Agata hadn’t used half of
these results since she was a student, but though her memory of some of the formulas was hazy – and she was afraid to consult the photonic library lest she alert someone in authority to her
sudden change of interests – she discovered that she still had all her old paper textbooks at the bottom of a cupboard, not yet so insect-damaged as to be indecipherable.

Without access to the tubes themselves she couldn’t hope for a precise answer, but she could sketch the limits of what was physically possible. In the worst case, time had already run out:
if the tubes were large enough and the seals sufficiently tight, it could take half a year to infuse enough modified air into them to corrupt the signals.

In the best case, it would take close to three stints. So she had, at most, two stints to alter the composition of the mountain’s atmosphere sufficiently to get the process started.

Agata rechecked the numbers, but they did not improve. She sat at her desk with her tattered books around her, bewildered but refusing to be cowed. The ancestors had spoken to her; she was
joined to them across the disruption, across the generations yet to be born. The cosmos had no choice but to find a sequence of events that filled the gap and completed that connection, and it
could not come out of nowhere. The right plan had to lie within her, just waiting to unfurl.

Ramiro was beginning to wish that they’d put cameras on the occulters. The extra transmissions needed to send back the images might have increased the chance of
detection, but it would have been worth it just to have an objective version of the rendezvous with the cache in front of him, to take the place of the pictures in his head.

First, the occulter had to release itself from the rock, unwinding the drills and letting itself fall into the void. Then the air jets had to catch it and send it swooping back towards the
slopes, approaching the cache with just the right speed at just the right angle. Two hooks on strings hung down from the cache, each one an open half-circle crossed by a vertical trigger about a
third of the way in; the arms of the occulter needed to enter those half-circles and strike the triggers to send the second, spring-loaded halves sliding around to enclose them. Then the occulter
had to move away, dragging the cache almost horizontally across the rock, unrolling the adhesive resin that was holding it in place against the vertical tug of its centrifugal weight.

Tarquinia interrupted his brooding. ‘Relax,’ she said. ‘Or add up the navigational tolerances again, if you want reassurance. We can hit the hooks, I’m sure of
it.’

Ramiro checked the clock on his console. ‘Maybe we can, if the occulter turns up. It’s already three lapses late.’

‘Three days crossing the slopes, and you want it to be punctual to the flicker?’

‘These things move like clockwork, literally. If not to the flicker, they ought to be punctual to the lapse.’

Tarquinia said, ‘If this turns out badly, I’ll drop my anti-messaging principles and let you know . . .’ She glanced at the clock. ‘One lapse from now.’

Ramiro buzzed dismissively. ‘How would that help?’

‘It wouldn’t,’ she admitted. ‘But if you can convince yourself that I’m telling the truth, you can relax and assume that silence means success.’

A row of numbers appeared on the console – a transmission from the occulter, not from Tarquinia’s future self. Ramiro waited, refusing to interpret the numbers in isolation. Then the
second brief report followed.

The occulter was stable, well clear now of the cache site . . . and measurably more massive than before, as revealed by its response to the thrust of the air jets. It had picked up its cargo and
held on to it, and as the bomb swung down from above the arms, the occulter had successfully compensated for the spin that would otherwise have been imparted.

A moment later a third report announced that the occulter had managed to drill itself into the rock again.

‘One more,’ Ramiro pleaded. To catch the hooks and stay balanced was miracle enough, but the occulter needed to be able to keep moving down the slopes towards the base. If the
strings had become tangled around the arms, they’d either end up breaking and freeing the cargo, or the whole mechanism would grind to a halt.

‘And there it is.’ Tarquinia read all the numbers aloud, and worked through the meaning of the torques. The occulter was moving in the normal way, and it was still carrying the bomb.
Nothing had jammed, nothing had broken.

‘There it is.’ Ramiro bent forward, willing the tension out of his shoulders, but only a fraction of the pain departed. A dozen and two equally finicky and precarious encounters
remained.

Tarquinia said, ‘The mass is less than I was expecting.’

‘The mass of the cargo? You think we lost something? Dropped some component—?’

‘No!’ Tarquinia hesitated. ‘I suppose I’m just admitting that Giacomo seems to have been honest with us. I was afraid he might have downplayed the size of the
bombs.’

‘But he didn’t.’ Ramiro was pleased. ‘We’ll need to get every one of them exactly on target, though. A few strides away and we might not even shatter the
collector.’

Tarquinia was amused. ‘We just threaded a needle on the slopes, and you’re talking about missing by strides?’

‘We had no time window with the cache,’ Ramiro pointed out. ‘There’s no comparison with the base. In fact, if I was working for the Council I would have told them to
build decoys: dozens of structures mimicking the light collectors, with exactly the same optics protruding from the surface. Who’s to know which ones really feed into the tubes?’

Tarquinia said, ‘Giacomo’s group has had three years to think about all that. If they’d had any doubts about the coordinates they could have gone for a different strategy. If
we start trying to second-guess them now, we’ll go out of our minds.’

‘Yeah.’ Ramiro turned back to the console and read through the last report again, until he’d convinced himself that the numbers could not mean anything but success.

The next two encounters went as flawlessly as the first, but as the time for the fourth pickup came and went there was silence from the link. It stretched on for more than half a bell, until the
fifth occulter began reporting.

Three bells later, the same thing happened again. They’d lost two machines.

At the second last scheduled rendezvous, the occulter missed the hooks and flew right past the cargo, its mass unchanged. Tarquinia stepped in, sending it looping back to try again – not
at the same coordinates, but a progression of slightly shifted locations. Ramiro stood aside and watched her work, wishing more than ever for a camera as she swept the occulter over the slopes,
trying to engage with a cache that had either slipped a little out of place or simply fallen away into the void.

After the fifth attempt she stopped the occulter and had it drill back into the rock.

‘Can we send it to another cache?’ she wondered.

Ramiro checked the positions of the three caches for which they’d had no occulters. This one would have to double back to reach any of the three – depleting its air tank to the point
where it would not be able to make it to the base.

‘It’s as good as lost,’ he said. ‘We now have no spares.’

The last pickup was still almost a bell away. Tarquinia said, ‘Do you want to get some loaves? I’ll stay here in case there are any surprises.’

As Ramiro stood in the queue in the food hall, he noticed a group of diners stealing glances in his direction then turning away with pained expressions, as if his presence were mildly
embarrassing. Perhaps he’d become a figure of pity for wasting half his life on the expedition, to so little avail. But if all the real action had been back on the mountain, what exactly had
anyone here done to earn the right to look down on him this way?

‘I trust you’re keeping out of trouble.’

Ramiro turned to see the woman who’d addressed him, three places behind him in the queue.

‘You’re brave, showing your face in the mountain,’ he told Greta.

‘I’ve never left,’ she replied. ‘I never will. I’m staying through whatever comes.’

‘ “Whatever comes”?’ Ramiro felt his anger rising. ‘You talk about it as if it’s some uncontrollable mystery, but I know you could persuade the Councillors to
switch off the system, if you really wanted to. Once they’d made the plan and automated the shutdown, that would be it – there’d be nothing to fear.’ He called out to the
diners, ‘This woman could set your minds at ease in an instant! Why aren’t you demanding it?’

Greta said, ‘So if we shut down the system deliberately – just close our eyes to danger – the danger will go away? That’s a child’s way of thinking.’

‘Our eyes will be closed whatever we do,’ Ramiro replied. ‘There’s nothing to lose by closing them voluntarily. After the disruption we’ll find out soon enough if
there was any other cause.’ He tried again to rouse the spectators. ‘Isn’t that fair?’ he shouted. ‘Isn’t it worth trying? You should be demanding it!’

But no one was being stirred into action; they just stared down at their food. What had they told themselves in their messages? ‘Man from expedition made fool of himself in the food hall
today, yelling at government adviser.’ They already knew that they wouldn’t take his proposal seriously enough to make any kind of fuss. And having told themselves as much, even if it
made them feel a little weak and ashamed there was nothing they could do about it.

Ramiro collected his loaves from the counter and walked out. As his anger subsided slightly, he wondered if he’d been unfair to Greta. Not even the great fixer could sway the Councillors
into acting entirely against their nature. Having chosen their own defining qualities, they wouldn’t surrender power or deny themselves information – even when it was certain that
events would soon relieve them of both.

Back in the apartment, Ramiro watched Tarquinia eating but he had no appetite himself. ‘If this last one fails,’ he said, ‘don’t break your principles
and send back a message.’

Tarquinia said, ‘I have a better idea: I solemnly promise that if it does fail, I’ll send a message to you to be delivered yesterday.’

The first report from the final occulter came in: it had reached the location where the cache was meant to be.

The second report showed the occulter still stable, weighed down with its expected cargo.

The third report declared that the machine had reattached to the surface.

And the fourth report demonstrated that it had retained its powers of locomotion.

They had twelve targets, twelve bombs, and twelve machines with which to deliver them.

Tarquinia said, ‘It looks as if we’re the disruption after all.’

Ramiro wasn’t so confident, but if the Council was intent on declining the role he was happy to match their stubbornness. It was his nature to oppose the messaging system, and history had
finally offered him a route to its destruction just a few stints long. Until a meteor fell from the sky to show him up as an irrelevant trespasser, all he could do was keep following that path, and
hope that the footprints in the dust ahead really were his own.

‘I knew you’d want your old job back,’ Celia declared.

Agata wasn’t sure if she should take this claim literally. She was surprised that Celia remembered her at all, though they had been on duty together when the bomb went off. In the four
years since she’d been here the ramshackle office hadn’t changed, but the new construction along the axis had made it much harder to reach.

‘I mean, now that you can’t do cosmology,’ Celia clarified, holding out the patch for Agata to sign.

‘Exactly,’ Agata agreed, forming her mark and accepting the tool belt from her supervisor. ‘I thought I’d better make myself useful somehow.’

‘Do you think it’s a meteor coming?’ Celia asked phlegmatically.

‘No one can rule that out,’ Agata replied. ‘But I’m still hoping that it’s just a glitch in the system.’

Celia looked sceptical, but she didn’t press Agata for a detailed hypothesis. ‘Don’t take offence,’ she said, ‘but some of the older workers find it helpful to
rehearse their resorptions and extrusions before going in.’

‘I’ll try that,’ Agata promised.

She made her way towards the entrance to the cooling system, trying to appear mildly dejected for the surveillance cameras: the woman who’d travelled across the cosmos to confirm
Lila’s great theory, reduced to menial labour – and this time with no zealous strike-breaker’s pride. In truth, she was ecstatic that she’d been allowed to take the job. The
automated employment system, bless it, had had no idea how far from ‘current’ her experience really was, and more to the point she had clearly not been flagged as any kind of security
risk.

Agata dutifully shortened and stretched her legs half a dozen times before fitting her access key to the hatch. As she descended into the cool air of the tunnel she felt a twinge of
claustrophobia and her memories of the blast came rushing back. She would never stop mourning Medoro, but she let the grief move through her mind like a familiar presence, with no need for
elaborate rituals or acknowledgements.

She made her way up-axis as swiftly as she could, advancing through the blackness, searching the walls for patches of red. Whoever had worked this section before her had been diligent; she saw
only the tiny specks of new growth, easily disposed of with a quick flash from her coherer. As far as she knew no one else would be coming here now, but she’d resolved to do a passable job
every shift in case there was an unannounced inspection. If her rushed work wasn’t quite as thorough as that of her younger colleagues she could always blame her failing eyesight, but there
could be no excuse for great glowing colonies of moss.