Rincewind rolled his eyes. ‘I have a very definite feeling about this,’ he said.

‘So have I,’ said Carrot.

It took them some time, but finally they pushed away a box of dishcloths and there were no more hiding places.

A worried face looked out of the nest it had made.

‘Ook?’ it said.

Leonard sighed, laid aside his pad and opened up the omniscope's box. He banged on it once or twice, and it flickered and showed the outline of a head.

Leonard took a deep breath.

‘Ankh-Morpork, we have an orangutan…’

Cohen sheathed his sword.

‘Wouldn't have expected much to be living up here,’ he said, surveying the carnage.

‘There's even less now,’ said Caleb.

The latest fight had been over in the twinkling of an eye and the cleaving of a backbone. Any… creatures that ambushed the Horde did so at the end of their lives.

‘The raw magic here must be huge,’ said Boy Willie. ‘I suppose creatures like this get used to living off it. Sooner or later something will learn to live anywhere.’

‘It's certainly doing Mad Hamish good,’ said Cohen. ‘I'll swear he's not as deaf as he was.’

‘Whut?’

‘I SAID YOU'RE NOT AS DEAF AS YOU WERE, HAMISH!’

‘There's no need to shout, mon!’

‘Can we cook 'em, do you think?’ said Boy Willie.

‘They'll probably taste a bit like chicken,’ said Caleb. ‘Everything does, if you're hungry enough.’

‘Leave it to me,’ said Mrs McGarry. ‘You get a fire going, and I'll make this taste more like chicken than… chicken.’

Cohen wandered off to where the minstrel was sitting by himself, working on the remains of his lute. The lad had brightened up considerably as the climb progressed, Cohen thought. He had completely stopped whimpering.

Cohen sat down next to him.

‘What're you doing, lad?’ he said. ‘I see you found a skull.’

‘It's going to be the sound box,’ said the minstrel. He looked worried for a moment. ‘That is all right, isn't it?’

‘Sure. Good fate for a hero, having his bones made into a harp or something. It should sing out wonderful.’

‘This will be a kind of lyre,’ said the minstrel. ‘It's going to be a bit primitive, I'm afraid.’

‘Even better. Good for the old songs,’ said Cohen.

‘I have been thinking about the… the saga,’ the minstrel admitted.

‘Good lad, good lad. Plenty of spakes?’

‘Um, yes. But I thought I'd start off with the legend of how Mazda stole fire for mankind in the first place.’

‘Nice,’ said Cohen,

‘And then a few verses about what the gods did to him,’ the minstrel went on, tightening a string.

‘Did to him? Did to him?’ said Cohen. ‘They made him immortal!’

‘Er… yes. In a way, I suppose.’

‘What do you mean, “in a way”?’

‘It's classical mythology, Cohen,’ said the minstrel. ‘I thought everyone knew. He was chained to a rock for eternity and every day an eagle comes and pecks out his liver.’

‘Is that true?’

‘It's mentioned in many of the classic texts.’

‘I'm not much of a reader,’ said Cohen. ‘Chained to a rock? For a first offence? He's still there?’

‘Eternity isn't finished yet, Cohen.’

‘He must've had a big liver!’

‘It grows again every night, according to the legend,’ said the minstrel.

‘I wish my kidneys did,’ said Cohen. He stared at the distant clouds that hid the snowy top of the mountain. ‘He brought fire to everyone, and the gods did that to him, eh? Well… we'll have to see about that.’

The omniscope showed a snowstorm.

‘Bad weather down there, then,’ said Ridcully.

‘No, it's thaumic interference,’ said Ponder. ‘They're passing under the elephants. We'll get a lot more of it, I'm afraid.’

‘Did they really say “Ankh-Morpork, we have an orangutan”?’ said the Dean.

‘The Librarian must have got on board somehow,’ said Ponder. ‘You know what he's like for finding odd corners to sleep in. And that, I'm afraid, explains about the weight and the air. Er… I have to tell you that I'm not sure that they have enough time or power to get back on to the Disc now.’

‘What do you mean, you're notsure?’ said Lord Vetinari.

‘Er… I mean I am sure but, er, no one likes bad news all at once, sir.’

Lord Vetinari looked at the big spell that dominated the cabin. It floated in the air: the whole world, sketched in glowing lines and, dropping from one glittering edge, a small curving line. As he watched it lengthened slightly.

‘They can't just turn around and come back?’ he said.

‘No, sir. It doesn't work like that.’

‘Can they throw the Librarian out?’

The wizards looked shocked.

‘No, sir,’ said Ponder. ‘That would be murder, sir.’

‘Yes, but they may save the world. One ape dies, one world lives. You do not need to be a rocket wizard to work that out, surely?’

‘You can't ask them to make a decision like that, sir!’

‘Really? I make decisions like that every day,’ said Lord Vetinari. ‘Oh, very well. What are they short of?’

‘Air and dragon power, sir.’

‘If they chop up the orangutan and feed him to the dragons, won't that kill two birds with one stone?’

The sudden iciness told Lord Vetinari that once again he hadn't taken his audience with him. He sighed.

‘They need dragon flame to…?’ he said.

‘To bring their ringpath over the Disc, sir. They have to fire the dragons at the right time.’

Vetinari looked at the magical orrery again. ‘And now…?’

‘I'm not quite sure, sir. They may crash into the Disc, or they may shoot straight out into endless space.’

‘And they need air…’

‘Yes, sir.’

Vetinari's arm moved through the outline of the world and a long forefinger pointed.

‘Is there any air here?’ he said.

‘That meal,’ said Cohen, ‘was heroic. No other word for it.’

‘That's right, Mrs McGarry,’ said Evil Harry. ‘Even rat doesn't taste this much like chicken.’

‘Yes, the tentacles hardly spoiled it at all!’ said Caleb enthusiastically.

They sat and watched the view. What had once been the world below was now a world in front, rising like an endless wall.

‘What're they, right up there?’ said Cohen, pointing.

‘Thanks, friend,’ said Evil Harry, looking away. ‘I'd like the… chicken to stay down, if it's all the same to you.’

‘They're the Virgin Islands,’ said the minstrel. ‘So called because there's so many of them.’

‘Or maybe they're hard to find,’ said Truckle the Uncivil, burping. ‘Hur, hur, hur.’

‘Ye can see the stars from up here,’ said Mad Hamish, ‘e'en though 'tis day.’

Cohen grinned at him. It wasn't often Mad Hamish volunteered anything.

‘They say every one of 'em's a world,’ said Evil Harry.

‘Yeah,’ said Cohen. ‘How many, bard?’

‘I don't know. Thousands. Millions,’ said the minstrel.

‘Millions of worlds, and we get… what? How old are you, Hamish?’

‘Whut? I were born the day the old thane died,’ said Hamish.

‘When was that? Which old thane?’ said Cohen patiently.

‘Whut? I ain't a scholar! I canna remember that kinda stuff!’

‘A hundred years, maybe,’ said Cohen. ‘One hundred years. And there's millions o' worlds.’ He took a pull of his cigarette and rubbed his forehead with the back of his thumb. ‘It's a bugger.’

He nodded at the minstrel. ‘What did your mate Carelinus do after he'd blown his nose?’

‘Look, you really shouldn't think of him like that,’ said the minstrel hotly. ‘He built a huge empire… too big, really. And in many ways he was a lot like you. Haven't you heard of the Tsortean Knot?’

‘Sounds dirty,’ said Truckle. ‘Hur, hur, hur… sorry.’

The minstrel sighed. ‘It was a huge, complicated knot that tied two beams together in the Temple of Offler in Tsort, and it was said that whoever untied it would reign over the whole of the continent,’ he said.