Tetrarch

'We already knew that.'

'How do we get underground?'

'There are steps down into all the old tar pits,' said Irisis. 'And tunnels leading underground off them.'

'But which pit?' he mused. Flydd stood for a moment, then squatted again. His knees popped in the still night.

A light grew in the sky behind them. A flaming catapult ball swished overhead, to thump into the ground close enough that they felt the impact. Irisis held her breath but the flames went out.

'I thought you gave orders about not firing into Snizort tonight?' she said.

'I did. Bloody rabble. No wonder we're losing the war. Let's try the main pit. Can you find that, Ullii?'

'Yes,' she said almost inaudibly.

It was easy to forget she was with them. They skirted sucking bogs and the edges of pits that quaked like jelly underfoot. They walked trails of sticky tar before descending 741 steps into the biggest of the many pits on the map; they entered a cavern or tunnel that had an eye-stinging, bituminous reek. Irisis could feel the walls with her outstretched hands.

Flydd stopped just inside. 'I'd expect most of the lyrinx to be outside the walls, in the battle,' he whispered into the absolute dark. 'But not all. There will be guards within the tunnels, and other lyrinx moving about. Maybe hundreds. We have to be absolutely quiet.'

You're making all the noise, Irisis thought irritably. She was desperately afraid of this place.

'I'm having trouble holding the concealing glamour,' he went on. 'We'll have to be quick. If I lose it…'

They went forward. Most of the tunnels were unlit. Irisis had no idea where they were and she knew Flydd was just as lost.

Ullii saw clearly and moved steadily on. She saw the enemy too. Thrice she alerted them just in time and they huddled in a pungent crevice or dripping hollow while lyrinx hurried by. They wandered a maze of tunnels until Irisis, without touching her pliance, began to feel the field swirling all around her. She had never experienced that before. They had been underground well over an hour.

'How far, Ullii?' said Flydd.

She did not answer.

'Surely the place will be guarded,' Irisis said.

'From what? There are twenty-five thousand lyrinx outside. How could any intruder get this far?'

'We have! And we guard our precious things.'

'Lyrinx are not like us. They do not steal from each other; they do not sabotage or vandalise. Besides…'

She detected an ominous note. 'What is it, Flydd? What aren't you telling us?'

'You would not station guards close to a node-drainer. If they were there too long it would begin to… disrupt them.'

A memory flashed back. 'Like – the way it disrupted the rock of the mine at the manufactory?'

A long pause before he whispered, 'Precisely.'

'So this is going to kill us. It'll take our bodies apart.'

'Not if we're quick. Jal-Nish survived it, if you recall.'

She took him by the shoulders. 'How long before it disrupts us, Xervish?'

'How the blazes would I know?'

'Ten minutes? An hour? A day?'

'Maybe an hour. Maybe two. Depends how strong it is, and how close we have to get to it.'

She stood in the corridor, unmoving. 'Irisis?' said Flydd.

'So be it.' They continued, but shortly she stopped again, allowing the seeker to move around the corner out of hearing.

'What now?' he said irritably.

'What's it going to do to Ullii's baby?' she said in his ear.

'It will have to take its chances like the rest of us.'

'But it… Ullii… We've got to tell her. At least give her the choice.'

'We're all soldiers in a war, artisan,' he said harshly. 'You, me, Ullii and the child. If we fail, humanity is doomed and where is the child then? We must all follow orders. Is that clear?'

'Yes, scrutator.'

They hid from another guard. Flydd's glamour still held, for the lyrinx looked right at them without seeing anything. It peered around uneasily, sniffing the air, its skin patterning in the light of a distant lamp, before hurrying away.

'Glamour's failing!' Flydd was bent over, holding his belly. 'Barely… hold it.'

She helped him up and they hurried after Ullii who, no longer roped to them, had disappeared down the tunnel. Irisis was all knotted inside. This was going to go wrong, she knew it.

It began as the merest tickle across her shoulder blades, indicating that they were within the sphere of influence of the node-drainer. The sensation grew stronger. Soon the flesh beneath her skin was shuddering as it was tugged one way and another. Her stomach began to bubble like a brewing vat. Ullii gasped. Her body was racked by sinuous heaves. Flydd groaned and the cloaking spell vanished.

'Watcher!' hissed Ullii, sniffing the air like a dog.

F IFTY-NINE

Before and after his brief meeting with Tiaan, Gilhaelith had spent days surveying the Great Seep, from the ground and the network of tunnels below it, until his maps were as accurate as he could draw them. The lyrinx drove him hard, making it clear that the project was urgent and had priority over every other activity at Snizort. He wondered why.

Gilhaelith was not working as hard as they thought, at least not on their project. He spent every spare moment with his icy scrying globe, pretending to do their work, but really studying the Snizort node, which fascinated him. It turned out to be a very strange one, and the fluctuations in its field were extreme, though that might have been because of the power the lyrinx drew from it for their flesh-forming.

And then again, it might have had something to do with the amplimet, for Gilhaelith suspected it was up to its old tricks again. With the globe he picked up occasional, inexplicable pulses which could hardly be due to anything else.

He went on to sensing out the hot spot that powered the seep. That was not hard for a geomancer of his experience. He had spent more than a century monitoring Booreah Ngurle in a similar way. Finally, most difficult of all, he had to scry out the pattern of slow currents that brought warm tar to the surface of the Great Seep, and carried cooler material down again, in complex whirls and eddies.

The tar moved almost imperceptibly, though over seven thousand years it must have travelled quite a distance. Gilhaelith had brought back much geomantic equipment, but none of his crystals and devices proved sensitive enough for this task. Nor, though he spent ages adjusting it, his globe. He had been here for weeks and Gyrull was angry at the lack of progress.

There was another way – to forecast the path of the currents using mathemancy. He had never used that Art in this kind of endeavour before and was not sure if it would prove any use at all, but what else could he do? After a night and a day, Gilhaelith set aside his arrays of numbers, checked the map and pointed to a particular location. 'Start digging here, and go in this direction.'

'Are you sure?' asked the truth-reader.

'As sure as I'll ever be.' That was true enough.

Matriarch Gyrull blew on a horn. Lyrinx appeared from everywhere. They went down to the place Gilhaelith had indicated. Gyrull marked the sandstone face with a claw and they began to hack at the soft rock with tools like enormous mattocks, extending a tunnel toward the Great Seep.

The work continued day and night. When Gilhaelith returned in the morning to set up his surveying crystals, they had advanced by sixty paces, incredible progress even under such good conditions. The lyrinx worked as though possessed, and they were – Gyrull never had to remind them how important their work was, or how urgent.

The second day they made nearly as much ground, and the third another forty paces, the work slowing because of the heat, and because the rock here was saturated with tar and difficult to work. At this point Gilhaelith saw the lyrinx's true genius.

Two of the creatures lugged in a metal ring slightly smaller than the diameter of the tunnel. After mounting a mushroom-shaped object called a phynadr in the middle of the ring, they activated it using a long rod. Cold pain sparkled in Gilhaelith's temples, doubling him over. By the time he recovered, the ring was concealed by freezing mist.