'I wish you'd told me where you were going,' he said irritably.

For once she did not cringe. 'I knew where you you were.' She gave him such a sweet smile that it was impossible to be angry with her. were.' She gave him such a sweet smile that it was impossible to be angry with her.

'Come up. It's time for dinner.'

He followed, admiring her figure. Nish prepared dinner, a gruel made of mashed and boiled grains for her, since she could not bear any kind of strong flavour, and much the same for him but with hot spices and smoked meat added.

Nish ate his dinner moodily. If he began the instant it was light, he might just manage to collect enough fuel by darkness, and that was not good enough. The witch-woman might have discovered that the crystal was gone. She could stop him with a single flaming arrow, for the tar-sealed silk would burn like a torch.

By the time he had cleaned up, Ullii was asleep and Nish knew better than to disturb her. He spent a frustrated, agonising night, punctuated by trips to replenish the brazier, and before dawn gave up hope of sleep.

The day crawled by. Nish set Ullii to keep lookout for Tiaan and the Matah. Each time he returned with his burden of fuel, the brazier was out. By lunchtime the balloon had begun to fill but it was a long way from lifting off. Ullii sat beneath the boulder, still scribbling with her pencil-stone. The patterns made no sense at all. He was gnawing on a lump of smoked meat when the seeker gave a whimper and curled up.

'Ullii?' he whispered. 'What's the matter? Is it the witch-woman?'

She did not answer, which meant it was a major distress. He felt for his knife, though it was useless against the likes of the Matah. Climbing the rope ladder to the brazier, Nish scanned the surroundings. He saw nothing in any direction. Nothing moved but a white eagle soaring on the updraught above the icefall. Its beak was bright yellow.

When he reached the ground, Ullii had partly unfolded. He tried to discover what had scared her but she was unable to articulate it. 'Hooks and claws,' she said over and over again, referring to something seen in her lattice. He tried to put it out of mind.

Nish was about to go for another load when he noticed the lump of pencil-stone in her hand. The manufactory sometimes burned it in the furnaces. 'Where did you get that, Ullii?'

'Up mountain,' she said in a barely audible voice, still suffering.

He took her hand. 'Is it far? Can you show me?'

'Not far.'

After a short climb they reached a steep face where the dark and light rock stood on end, dipping back into the mountain like layers in a cake. At head height the soft rock had weathered away, leaving an elongated cavity the width of Nish's hips. Several lumps of black, shiny pencil-stone were stuck to the overlying slate. Inside, the cavity was half full of chunks the size of his fist.

Nish climbed in and began to scoop them into his bag. To his amazement, Ullii joined in with the work, and soon the bag was bulging. 'Beautiful fuel,' he said, laughing for joy.

Back at the balloon, he stuffed the brazier, packed lichen all around and carefully poured in half a cup of tar spirits. The pencil-stone would need a hot fire to burn. He flew down the ladder, afraid he had used too much spirits. Nothing happened for a couple of minutes, then with a whoomph the fuel went up and flames roared out the top of the flue.

'More!' They raced up the slope, filling another bag each. The balloon was starting to swell visibly as they returned, though they would need more fuel to take them any distance.

He had come back with a third load and was topping up the brazier when Ullii choked and dropped her bag, spilling pencil-stone across the ground. 'What is it?' he called.

The little seeker looked as if she was having a fit. Her teeth were bared, her eyes staring. She tried to tell him something but managed only incoherent squeaks.

The hairs stood up on the back of his neck. He scanned the mountain and immediately saw two figures, only minutes away. One was the Aachim witch-woman, the other Tiaan. As he ran down the ladder, something broke the air in the west. Three winged shapes, too big and bulky to be eagles or even skeets. They were lyrinx, and heading directly for the balloon.

He fled down the ladder, frantically undoing the ropes, though the balloon was not quite full enough to rise. Moreover, the basket had jammed between the rocks in its fall and would have to be worked free.

Nish hurled in his bag of pencil-stone, the packs and what remained of Ullii's load. 'Ullii!' he yelled. 'There's no time. We've got to go.'

She made not a sound. He lugged her up, thrust his knife in his belt, decanted half a mug of tar spirits and scampered up the ladder. Lifting the lid off the brazier, he tossed the liquid in. It exploded in his face; Nish felt his hair frizzing. Slamming the lid, he leapt onto the nearest boulder and gave the basket a heave. It did not budge. It was jammed tight. Despair coiled around his heart. Not only was he going to lose the crystal but probably his life as well.

Jumping down between the boulders, he put his shoulder under the basket and heaved. It moved a fraction but jammed again. He tried the other side. The edge of the basket dug painfully into his shoulder. The basket sc.r.a.ped along the rock, then stopped.

The balloon was now as round as a globe and the ropes that held it to the basket were taut. It was ready to lift. Scrambling up the side, he shook the basket. It moved but did not free.

The lyrinx were descending rapidly now. The witch-woman was just fifty paces away. She threw out her arm, pointing at him.

Nish ducked. Golden sparkles burst in his eyes but he was otherwise unharmed. The witch-woman clutched at her chest as if in pain, then tottered forward. Nish shook the basket and felt something give. It lifted a handspan before jamming again.

If only he had a branch; anything to use as a lever. 'Come on,' he screamed, shaking it. 'Just move!'

It did not. The witch-woman plodded around the boulders to come at him from the other side. She looked distressed. Nish wished a heart attack on the old fool.

'Give up the crystal, artificer,' she called.

'Be d.a.m.ned!' he snarled, ducking behind the basket for a rock.

She put out her hand, fingers hooked as if she were holding an egg, and slowly closed them. It was as though they had closed about his throat. Nish could not breathe. His face began to swell; his tongue was forced out through his lips. He gave a grunting squeal, which was answered by a moan from inside the basket.

Tiaan began to climb the rock. She had a length of metal in one hand. With a tremendous effort of will, he tore away from the Matah's illusion and gasped a breath of air.

'Ullii,' he choked. 'Save me.'

Ullii's head appeared over the side of the basket, bobbing up and down. 'Don't know what to do,' she quavered.

'Throw something at the witch-woman. Try to knock her out.' He groped for his knife.

Ullii hurled out her half-filled bag of pencil-stone, which flew wide, scattering black lumps everywhere.

'Not the fuel!' he screamed. 'Haven't you got a brain in your head?'

The seeker moaned. Then, to Nish's horror, her chest pack, with its infinitely precious amplimet, soared out of the basket and struck the witch-woman in the face, knocking her down.

The pressure on his throat eased but before he could move Tiaan threw herself at him. He swiped at her but his knife was in the wrong hand and the blow missed. Tiaan thrust out the metal rod. He yelped, thinking she was going for his groin, but the rod went between his knees. She wrenched it sideways, his left knee collapsed and he toppled off the rock.

The fall seemed to take a long time. Nish thought he was going to land on his head, then his back. As he tumbled over, he realised that the knife was pointing up and he was likely to impale himself on it. He twisted in mid-air, slammed into the ground and felt a burning pain in his side.

He rolled over, groaning. Wetness flooded his shirt. A few steps away, the witch-woman was on her knees. Tiaan hurled herself on the pack. With a cry of triumph, she held up the amplimet.

Ullii wept. Nish groaned. His eyes met Tiaan's, then slid sideways to where the wings of the descending lyrinx darkened the sky.

'Enjoy your triumph!' he gritted. 'It won't last long.'

'Nor your tragedy,' said Tiaan. 'Goodbye, Nish. I hope we never meet again.'

'We will,' he said. 'Oh yes, we will, artisan. Traitor! Traitor!'

He hauled himself onto the rock. Tiaan was helping the witch-woman up the hill. Near the point where he had first seen them, they stopped, their backs to a jagged outcrop, and prepared to defend themselves.

Two lyrinx came gliding down in spirals. Was it better to flee, or hang around in case the battle gave him a chance to recover the crystal?

The first seconds dashed that hope. The witch-woman held out her arms and another of those shining bubbles, a huge one this time, burst forth to explode against the chest of the leading lyrinx. The creature seemed to freeze in mid-air, rolled and landed on its back. The second flapped away. He could not see the third.

Nish had seen enough. The witch-woman was too strong. The crystal was lost. He shook the basket and it moved up. Climbing in, he took hold of the balloon ropes and pulled down hard. It came a little way and rebounded. The ropes snapped taut and with a tearing of cane the basket slid out. They were away.

At last they were free of the heavy earth, where every step was a labour and the smallest river an impa.s.sable barrier. Up here, Nish felt in control of his life again. He did not have Tiaan, nor the crystal, but he had done the best he could. Most important of all, he had warned the scrutator about the invasion. Nish settled back. Just for a few minutes he was going to enjoy the ride.

The balloon shot up. Well above the level of the glacier, a strong wind pushed it away from the mountain, to the west. Nish frowned. He wanted to go east. Perhaps he should go down again, in some isolated place, and wait for a wind that would carry them the right way. That could be a long wait at this time of year. He reached for the release rope.

'No!' cried Ullii, holding her hands over her ears. 'No, no!'

She was turning round and round, facing up at the sky. Her hands batted at the air; then, to his utter astonishment, she tore off the mask, exposing her naked eyes to the daylight. They were watering so much that pink tears ran down her cheeks.

'Noooo!' she screamed.

The third lyrinx had remained high up, on watch. Now it soared effortlessly after them. It was smaller than the others, no larger than a big man. Its outer, armoured skin was so transparent that he could see the more human inner skin beneath. It looked delicate, almost fragile, until Nish caught sight of the finger-long, extended claws.

Blood trickled down his side and Nish felt a momentary dizziness. Clutching one of the ropes, he stared at the approaching lyrinx. How would it attack? The basket was difficult to get at from the air; the creature would not want to risk tangling itself in the ropes.

Perhaps it would swoop down and come at them from below, or even try to knock him out with the Secret Art. All flying lyrinx were mancers that was how they kept their ma.s.sive bodies aloft. More lyrinx have died trying to fly on our heavy world than have been killed in the war More lyrinx have died trying to fly on our heavy world than have been killed in the war, he recalled Scrutator Flydd saying. If he could distract it in some way he might have a chance.

Nish held out his sword, which made him feel better. He weighed the rope in his hand, balancing on the b.a.l.l.s of his feet. The creature would have a harder job than it thought.

He was wrong. The lyrinx had no intention of attacking him. It altered course, darted for the side of the balloon and, with a single swipe of its claws, tore through the fabric.

Air hissed out. The balloon plunged toward the rocks, far below.

Ullii stopped screaming.

SIX.

Are you all right?' Tiaan yelled as the second lyrinx lunged towards them. Backing under the overhanging rock, she whacked at it with her rod. The lyrinx retreated a step. She held no threat but it was wary of Malien.

Malien was breathing hard. 'I've not used the Art to defend myself in two hundred years. Just give me a minute.'

Lowering her head, she took several deep breaths. 'After the last time, I swore I would devote myself to peace. You have undone all that in a day.'

'I'm sorry ' Tiaan began.

'Hush! I'm not blaming you.'

Malien peered out from under the rock. The first lyrinx still lay on its back, one leg moving feebly. The other was three or four paces away, standing with wings spread, watching them. It was a ma.s.sive creature, many times Tiaan's weight, and all of it bone and muscle. The armoured skin plates made it difficult to attack, even with sword or spear. The large mouth was agape, revealing hundreds of grey teeth. Its eyes, under prominent brow ridges, shone with intelligence. Beautiful colours shimmered across its chameleon skin, iridescent blues, greens and reds. Skin-speech: used for communication, to frighten enemies, and sometimes just for the joy of it.

'Even three would not have troubled me when I was in my prime,' Malien muttered. 'Of course, that was a long time ago and this is a poor place to defend. If there are more of them around, we can't hold out. We've got to get back inside.'

'They'll just come after us,' said Tiaan.

'Tirthrax has defences. Keep an eye out for the third lyrinx.'

Edging out from under the shelf, Tiaan scanned the sky. She saw the creature at once, swooping toward the balloon, which was now just a small black teardrop in the western sky.

'What's it doing?' she said as lyrinx and balloon merged. The balloon fell out of the sky and disappeared. The lyrinx turned back towards them.

Tiaan felt sick. For all her hatred of Nish, she did not want him to die that way. Nor Ullii, who seemed harmless and had been kind to her. 'It's torn open the balloon. Now it's on its way back.'

'Flying drains them. We'd better move before they recover. Give me the rod.'

Tiaan pa.s.sed it to her. Malien slid her hands back and forth along it, and Tiaan felt the hairs on her arms rise up. Malien pressed forward, holding the rod out toward the standing lyrinx. A silver bead formed at the end, swelling and glowing like molten gla.s.s on the end of a gla.s.sblower's tube. When the bead was about the size of a melon, she thrust it at the lyrinx.

The creature clapped its hands together. The globe broke out in bright speckles, like metal filings sprinkled into a fire. Malien's neck sinews stood up. The lyrinx went rigid, straining to overcome an invisible force. Malien muttered under her breath. The globe burst and the lyrinx went tumbling backwards down the slope.

She fell to her knees, dropping the rod. 'That hurt,' she gasped. 'How are we doing?'

Tiaan picked the rod up. 'The lyrinx isn't moving but I don't think it's dead. The flying one will be here in a minute or two.'

'No, it's not dead. I'm not a killer, Tiaan. Give me a hand.'

They made their way up the slope, Malien's weight heavy on Tiaan's shoulder. The flying lyrinx began to circle around them. Tiaan stopped abruptly.

'What is it?' Malien asked.

'I know her.' Tiaan was staring at the transparent-skinned creature. 'Her name is Liett. She was one of the lyrinx at Kalissin; a flesh-former.' That roused unpleasant memories.

'What will she do?'

'I have no idea,' Tiaan said. 'I spent three months as their prisoner, but I knew little more about them at the end. Though ...'

'Yes?'

'They are deadly in battle, but when you get to know them ... I found them to be honourable creatures.'

'That's encouraging,' said Malien, 'yet I can't say I want to get to know them.'

They watched the circling lyrinx, which now turned and flapped towards the two fallen ones. 'She's given up.'

'They know where we are. They can come back at any time, with an army.'

The lyrinx did not attack again, though as Tiaan and Malien made the weary climb up the mountain, Tiaan twice saw Liett circling high above. After they pa.s.sed into Tirthrax, Liett flew east.

'What do we do now?' Tiaan asked as they rested in the entrance.

Malien unwrapped a food packet. 'Have some filuvior.'

Tiaan took a chunk of something that looked like green, crumbly cheese but dissolved smoothly in the mouth. It had a taste she could not put words to, a combination of aromatic, creamy and acrid. Her mouth tingled afterwards but she did feel better.

'What is this stuff, Malien?'