Tiaan hugged her tightly. 'Did you see him too?'

'He was inside my head. He looked sad.'

The amplimet must be incredibly powerful here, if it could induce images in an ordinary mind. 'That is my lover, Minis.'

'Lover?' Haani sounded puzzled.

'He is the man I am going to bond with. We have come all this way to find him and help him, for he is in bad trouble. Is he not the most handsome man you ever saw?'

Politely, Haani did not answer that.

Minis was back, a little stronger now. Tiaan, this is what you must do. Somewhere in Tirthrax there will be a room guarded by a triplet of sentinels, the little black devices like witches' hats that sound the alarm. It may even be on the level you are on. We don't know. None of us has seen it. All we have here are ancient records; very ancient! The room will have this kind of symbol on the door Tiaan, this is what you must do. Somewhere in Tirthrax there will be a room guarded by a triplet of sentinels, the little black devices like witches' hats that sound the alarm. It may even be on the level you are on. We don't know. None of us has seen it. All we have here are ancient records; very ancient! The room will have this kind of symbol on the door.

He drew a swirling pattern in the air, with neither beginning nor end, inside nor outside. Fire followed his finger, reminding Tiaan of shapes she had seen on the hyperplane.

Touch the symbol with your crystal and you should see a mind-map of the lock. Work it and the door will open. Inside will be devices of metal, wire, crystal and glass. Minis described a variety of objects the like of which she had never seen before.

You must take them apart and put them together into a larger device, like this. Minis put a plan into her mind, like a three-dimensional blueprint, rotating it so she could see exactly how it was structured. Minis put a plan into her mind, like a three-dimensional blueprint, rotating it so she could see exactly how it was structured.

When that is done you must test it, thus! What's that? He looked away. He looked away.

It can't be done! came a harsh male voice. came a harsh male voice. She'll ruin the amplimet. She'll ruin the amplimet.

No matter to us if we're extinct, Vithis, a woman replied. The voice was familiar though Tiaan had forgotten the name.

They moved out where Tiaan could see them. Vithis was tall, long in the face but haggard-looking, with deep creases etched into his cheeks.

I say we face our fate on our own world. He bit off each word as if he wanted to spit it in their faces. No good has ever come out of Santhenar. There is still a chance in the polar catacombs. I would take my clan there, even if we go alone! No good has ever come out of Santhenar. There is still a chance in the polar catacombs. I would take my clan there, even if we go alone!

Then you will will go alone go alone, said Tirior, a handsome woman with black curly hair. The Ten Clans are behind me, Vithis. Santhenar is our sole hope The Ten Clans are behind me, Vithis. Santhenar is our sole hope.

I will not be bowed, he said.

There is no chance, Vithis, said Tirior. Tell him, Luxor! You're the only one he'll listen to Tell him, Luxor! You're the only one he'll listen to.

Luxor could not be seen, though Tiaan remembered his dead voice.

Vithis, even in the catacombs the temperature is rising fast. The polar ice is melting; if you don't bake there, you'll drown. There's no way to keep the sea out. The gate is our only chance.

I would sooner take Clan Inthis to the Well of Echoes!

It has not come to that! cried Luxor, clearly shocked. cried Luxor, clearly shocked.

It is the noble way out.

Tirior appeared to relent. Not that, Vithis. Inthis is, as you remind us, First Clan. I will humble myself. I beg you, come with us Not that, Vithis. Inthis is, as you remind us, First Clan. I will humble myself. I beg you, come with us.

Ha! cried Vithis. cried Vithis. I never thought I'd see it I never thought I'd see it.

He stalked back and forth for several minutes, whereupon he whirled and returned to the group. His face had set hard as congealed lava. Very well. Clan Inthis will join the Ten; but only if I am leader Very well. Clan Inthis will join the Ten; but only if I am leader.

You, Vithis? cried Tirior. cried Tirior. But you have always been against this venture. Folly, you've called it from the first But you have always been against this venture. Folly, you've called it from the first.

Aye, I did, and still do. But if we are to take this path, I must lead the Clans.

Why? she said imperiously. she said imperiously.

Because I do not believe. I always question. And because only I of all the clan leaders have truly thrown off the slave's mindset.

We were slaves for thousands of years, Vithis. It has changed us forever. We cannot go back to what we once were.

You still think like slaves, though we gained our freedom near four hundred years ago. But I have a vision for the Aachim. If the Clans are to go to the new world I must lead. still think like slaves, though we gained our freedom near four hundred years ago. But I have a vision for the Aachim. If the Clans are to go to the new world I must lead.

Come, said Luxor, urging them away. Not in front Not in front...

The image disappeared. Tiaan heard them talking but she could not make out what they were saying. After some minutes the image came back.

It is agreed, said Tirior. You will lead us, Vithis. Clan Inthis may take the honour of first across, if the gate succeeds You will lead us, Vithis. Clan Inthis may take the honour of first across, if the gate succeeds.

You'd like us to take the risk, sneered Vithis. Then if something goes wrong, you're rid of us! You've always resented Clan Inthis, Tirior Then if something goes wrong, you're rid of us! You've always resented Clan Inthis, Tirior.

Don't be absurd, she replied.

I will be in the vanguard. I am prepared to take the risk for myself, as long as I see my clan safe. Clan Inthis will come last.

As you wish, she said equally coldly.

The risk is slight, said Luxor, since the device is unlikely to work. How could an untrained human possibly assemble a working zyxibule, even with an amplimet? Even at the greatest of all nodes? She will surely fail. since the device is unlikely to work. How could an untrained human possibly assemble a working zyxibule, even with an amplimet? Even at the greatest of all nodes? She will surely fail.

People do surprise, said Tirior, and this human has done it over and again. But, if there is to be a chance, she must have the best preparation we can give her. Let us not waste time. Minis, continue the instruction as we have laid it out for you. and this human has done it over and again. But, if there is to be a chance, she must have the best preparation we can give her. Let us not waste time. Minis, continue the instruction as we have laid it out for you.

'I don't understand what you're trying to do,' said Tiaan. They assumed too much.

Do you not? Minis sounded amazed. Minis sounded amazed. But you spoke of it months ago, back in the ice sphere But you spoke of it months ago, back in the ice sphere.

'I have no idea what you're talking about,' she said.

You asked the original question!

'What question?'

You said, 'What if I tear open the wall between Santhenar and the hyperplane?' We assumed you knew. If it's done just right, you can create a wormhole that way.

Tiaan was beginning to feel really stupid. 'A wormhole?'

A passage that crosses a higher dimension between my world and yours. The hyperplane! You must have heard of gates, surely?

'Well, of course I've heard of gates gates!' she said. 'They're in the Histories. Why didn't you say that in the first place?'

We assumed... Perhaps we assumed too much Perhaps we assumed too much, said Minis. You seemed so knowledgeable. Never mind. Yes, we hope you can help us make a device to form a gate between your world and ours. We will, of course, control it from here. Listen carefully You seemed so knowledgeable. Never mind. Yes, we hope you can help us make a device to form a gate between your world and ours. We will, of course, control it from here. Listen carefully.

He explained a complicated set of test procedures and the responses required. When you have assembled the device, which we call a zyxibule, tested it according to our instructions, and all is working properly AND NOT BEFORE, AT THE RISK OF YOUR LIFE put your amplimet in the cavity at the centre and call again. Do you understand what I have told you? When you have assembled the device, which we call a zyxibule, tested it according to our instructions, and all is working properly AND NOT BEFORE, AT THE RISK OF YOUR LIFE put your amplimet in the cavity at the centre and call again. Do you understand what I have told you?

'I think so.' She asked enough questions to be quite sure. 'What will happen then?'

With luck, and if you can still contact me, and everything works perfectly after all this time, and the worlds are aligned, and you can channel enough power through the amplimet into the zyxibule, it will open a gate between Santhenar and Aachan and we will come through to our new world.

'Are there many of you?'

Some thousands...

Tiaan was relieved. Enough to help with the war but not so many as to cause problems.

We are prepared. A few lyrinx will not trouble us. Will you get ready now?

'I will.' She feasted on Minis for a few seconds more. Soon he would be here and they would be together, forever! 'But, Minis, what if I can't channel enough power, or something else goes wrong?'

He looked uncomfortable. It could be that the gate won't open. Or it might open but close again before we can come through It could be that the gate won't open. Or it might open but close again before we can come through... He trailed off.

'What else?' said Tiaan. 'There is something else, isn't there?'

Minis looked away, then was thrust aside and the hard face of Vithis appeared. You know the risk of using the amplimet, artisan. It could happen that in channelling so much power you will be burnt from the inside out, or your mind destroyed but your body living on. The risk of that happening is considerable. Perhaps one in three or four You know the risk of using the amplimet, artisan. It could happen that in channelling so much power you will be burnt from the inside out, or your mind destroyed but your body living on. The risk of that happening is considerable. Perhaps one in three or four.

'Oh!' she whispered, sinking to her knees on the hard floor.

Another possibility is an explosion so colossal that the whole peak of Tirthrax mountain will be blown apart, and everything destroyed for twenty leagues around. We don't know, artisan. We never thought this plan would work. There was not enough time to properly design the zyxibule. We think think we know how it will work but we can't be sure until we try it. Then, if it goes wrong, it will be too late we know how it will work but we can't be sure until we try it. Then, if it goes wrong, it will be too late.

Well? he snapped. Are you still prepared to do this, to save what is left of the Aachim species? Do you have the courage? Do not raise our hopes falsely Are you still prepared to do this, to save what is left of the Aachim species? Do you have the courage? Do not raise our hopes falsely.

What about my my hopes? she thought desperately. Do hopes? she thought desperately. Do I I not matter? Clearly not to this bitter man. As an artisan, Tiaan had always lived with the threat of anthracism, though it had never happened in her manufactory. But this was an entirely different risk. She would have given up, but for Minis. Her death would be quick; his slow, painful and inevitable. not matter? Clearly not to this bitter man. As an artisan, Tiaan had always lived with the threat of anthracism, though it had never happened in her manufactory. But this was an entirely different risk. She would have given up, but for Minis. Her death would be quick; his slow, painful and inevitable.

'I will do it,' she said in an almost inaudible voice, 'if you will just explain again what I must do.'

Vithis did so, for Minis had not come back. Remember, when you have tested the device and put the crystal inside, call us. Be swift! Remember, when you have tested the device and put the crystal inside, call us. Be swift! the hard man said, and faded away. the hard man said, and faded away.

FIFTY-SEVEN.

The room guarded by three sentinels took a deal of finding, for so far they had seen only a tiny part of the vastness of Tirthrax. Halls and chambers stretched in all directions, carved into the heart of the mountain, and there were countless other levels, above and below.

It was Haani who found the room, for she spent her time wandering the halls. There were a number of chambers guarded by triple sentinels, though only one had the swirling symbol on the door, like an image of infinity.

As Tiaan touched her crystal to it, a representation of the lock sprang into her mind. It was like no other lock she had ever encountered. How did it work? She imagined the orbital chambers revolving. At once the mechanism went shuss shuss and the door opened to her touch. Tiaan went in with Haani trotting at her heels. The room was crammed with machines and devices great and small, though what function they performed no amount of examination could tell her. and the door opened to her touch. Tiaan went in with Haani trotting at her heels. The room was crammed with machines and devices great and small, though what function they performed no amount of examination could tell her.

One was enclosed in glass, like a bell jar the diameter of one of the roof pillars outside. Within sat a spongiform object of rough ceramic, rather like the fire bricks that lined the furnaces of the manufactory. From the myriad little holes protruded wire filaments or fine glass tubes, or sometimes both, the former inside the latter. The object was mounted on a rough-sawn slab of basalt with swirling patterns in copper fused to its polished top. A bundle of glass tubes came from a socket in the base. Some had threads of wire inside, not connected to anything.

Another was a single hexagonal prism of a dark-green mineral, striated down the sides, floating in a sealed glass dish of quicksilver. The crystal looked to be tourmaline, though more perfect than any Tiaan had ever seen. It would have filled a bucket.

There were many and various metal objects, some rough castings, others polished to the most brilliant lustre. Several objects had crystals or shaped pieces of smooth ceramic inset, or attached to protrusions, or connected by cables, wires or threads.

There were devices driven by a variety of mechanisms, some clockwork, though few of the cogs seemed to have a regular number of teeth and not all the gears were circular. Others had gears meshing with threaded rods, wheels driven by belts, or wound with wires, or mechanisms whose action was not apparent no matter how carefully Tiaan inspected them. In others, the workings were hidden inside cubes of crystal or onion layers of tinted glass.

Most seemed to have no input or output, which puzzled Tiaan mightily. She understood how a clock could be driven by a spring that eventually moved the hands, or how a mill powered by water could turn a grinding wheel. With these devices, she could find nothing to make them go in the first place, or what work they were supposed to do when they were going. And at the far end of the room, equally strange, was mounted an enormous metal slab, five spans high and three wide. It had no discernible function.

At least a day went by without Tiaan having catalogued the machines or worked out which ones she was to take parts from, or which connected to which. Tirthrax had few windows and the lightglasses stayed on whilever she was in the room, so she had little idea of the time.

Realising that it must be late, she looked around for Haani. The child was nowhere to be found and Tiaan could not remember when she'd last seen her. Certainly it had been hours ago. She went to the door. Haani was not visible. Where could the wretched kid have gone?

Tiaan called her name but there was no reply. She wandered across the floor of that vast space, her boots echoing. The child could be in any of a thousand rooms. She might have become hopelessly lost, or fallen down a shaft. Her mind roved over the infinite possibilities for disaster.

'Bother!' she said aloud. 'I don't have time for this, Haani.'

A childish shriek, high up. Tiaan ran screaming, 'Haani? Where are you? What's the matter?' Why, why why had she left her alone? Maybe some mountain predator lived in here. It was a perfect hideout. Now it had her and it was all Tiaan's fault. had she left her alone? Maybe some mountain predator lived in here. It was a perfect hideout. Now it had her and it was all Tiaan's fault.

Another shriek came floating down but this time she recognised it for what it was. Haani was shrieking with laughter. Where was she?

As she scanned back and forth a movement caught her eye, a flash through the hole, at least twenty spans above, where the spiral staircase went up through the ceiling to the next level.

'Haani!' she shouted, thinking that the child was falling.

Haani shot around in a spiral. She wasn't falling at all the little wretch was riding the metal banister, swirling round and down like water going down a plughole. If she went off the edge ...

But Haani did not. With a series of whoops and shrieks she slid the rail all the way down, shooting off the end and skidding across the smooth floor. 'Whee!'

Tiaan came running. She did not know what to say; she wanted to smack Haani, to yell at her to never do such a stupid thing again. Tiaan did neither, just stood with her arms hanging down and the terror frozen on her face.

Haani looked up at Tiaan's expression and the joy ran out of her. 'What's the matter?'

'I ...' Tiaan gulped. 'I thought some wild beast was eating you. And then, when I saw you, I was sure you were going to fall and be killed. Oh, Haani, I was so afraid.'

'I was having fun. I wasn't going to get hurt. You just don't want ...' She broke off.

Tiaan knew what she had been going to say. It saddened her because it was perfectly true. She cared for the child deeply but at the same time found her a burden, and resented her for it. What a selfish cow I am, she thought. She asks for so little, and even that I am incapable of giving her.

'Haani, I didn't want anything to happen to you. I love you too much.' It was true, though Tiaan only now realised it. She loved the child more than her own half-brothers and -sisters. More than her mother. More than anyone except Minis.

'You love me?' Haani whispered.

'Of course I do. Come here.' She held out her arms.

Haani stood unmoving. She took a step forward, stopped as if it could not possibly be true, took another step then flung herself into Tiaan's arms.

'I love you too,' she said in Tiaan's ear. 'You're not my mother though.'