Then Granny looked among the Stalls. The audience was mainly human. Here and there was the hulking shape of a troll, although the troll equivalent of operas usually went on for a couple of years. A few dwarf helmets gleamed, although dwarfs normally weren't interested in anything without dwarfs in. There seemed to be a lot of feathers down there, and here and there the glint of jewellery. Shoulders were being worn bare this season. A lot of attention had been paid to appearances. The people were here to look, not to see.

She closed her eyes.

This was when you started being a witch. It wasn't when you did headology on daft old men, or mixed up medicines, or stuck up for yourself, or knew one herb from another.

It was when you opened your mind to the world and carefully examined everything it picked up.

She ignored her ears until the sounds of the audience became just a distant buzz.

Or, at least, a distant buzz broken by the voice of Nanny Ogg.

'Says here that Dame Timpani, who sings the part of Quizella, is a diva,' said Nanny. 'So I reckon this is like a part‑time job, then. Prob'ly quite a good idea, on account of you have to be able to hold your breath. Good trainin' for the singin'.'

Granny nodded without opening her eyes.

She kept them closed as the opera started. Nanny, who knew when to leave her friend to her own devices, tried to keep quiet but felt impelled to give out a running commentary.

Then she said, 'There's Agnes! Hey, that's Agnes!'

'Stop wavin' and sit down,' murmured Granny, trying to hold on to her waking dream.

‑ Nanny leaned over the balcony.

'She's .dressed up as a gypsy,' she said. 'And now there's a girl come forward to sing'‑ she peered at the stolen programme–'the famous "Departure" aria, it says here. Now that's what I call a good voice–'

'That's Agnes singin',' said Granny.

'No, it's this girl Christine.'

'Shut your eyes, you daft old woman, and tell me if that isn't Agnes singin',' said Granny.

Nanny Ogg obediently shut her eyes for a moment, and then opened them again. 'It's Agnes singing!'

'Yes.'

'But there's that girl with the big smile right out there in front moving her lips and everything!'

'Yes.'

Nanny scratched her head. 'Something a bit wrong here, Esme. Can't have people stealing our Agnes's voice.'

Granny's eyes were still shut. 'Tell me if the curtains on that Box down there on the right have moved,' she said.

'I just saw them twitch, Esme.'

'Ah.'

Granny let herself relax again. She sank into the seat as the aria washed over her, and opened her mind once more...

Edges, walls, doors...

Once a space was enclosed it became a universe of its own. Some things remained trapped in it.

The music passed through one side of her head and out the other, but with it. came other things, strands of things, echoes of old screams...

She drifted down further, down below the conscious, into the darkness beyond the circle of firelight.

There was fear here. It stalked the place like a great dark animal. It lurked in every corner. It was in the stones. Old terror crouched in the shadows. It was one of the most ancient terrors, the one that meant that no sooner had mankind learned to walk on two legs than it dropped to its knees. It was the terror of impermanence, the knowledge that all this would pass away, that a beautiful voice or a wonderful figure was something whose arrival you couldn't control and whose departure you couldn't delay. It wasn't what she had been looking for, but it was perhaps the sea in which it swam.

She went deeper.

And there it was, roaring through the night‑time of the soul of the place like a deep cold current.

As she drew closer she saw that it was not one thing but two, twisted around one another. She reached out...

Trickery. Lies. Deceit. Murder.

'No!'

She blinked.

Everyone had turned to look at her.

Nanny tugged at her dress. 'Sit down, Esme!'

Granny stared. The chandelier hung peacefully over the crowded seats.

'They beat him to death!'

'What's that, Esme??

'And they throw him into the river!'

'Esme!'

'Sh!'

'Madam, will you sit down at once!'

'...and now it's started on the Nougat Whirls!'

Granny snatched at her hat and did a crabwise run along the row, crushing some of the finest footwear in Ankh­-Morpork under her thick Lancre soles.

Nanny hung back reluctantly. She'd quite enjoyed the song, and she wanted to applaud. But her pair of hands wasn't necessary. The audience had exploded as soon as the last note had died away.

Nanny Ogg looked at the stage, and took note of something, and smiled. 'Like that, eh?'

'Gytha!'

She sighed. 'Coming, Esme. 'Scuse me. 'Scuse me. Sorry. 'Scuse me...'

Granny Weatherwax was out in the red plush corridor, leaning with her forehead against the wall.

'This is a bad one, Gytha,' she muttered. 'It's all twisted up. I ain't at all sure I can make it happen right. The poor soul...'

She straightened up. 'Look at me, Gytha, will you?

Gytha obediently opened her eyes wide. She winced a little as a fragment of Granny Weatherwax's consciousness crept behind her eyes.

Granny put her hat on, tucking in the occasional errant wisp of grey hair and then taking, one by one, the eight hatpins and ramming them home with the same frowning deliberation with which a mercenary might check his weapons.

'All right,' she said at last.

Nanny Ogg relaxed. 'It's not that I mind, Esme,' she said, 'but I wish you'd use a mirror.'

'Waste of money,' said Granny.

Now fully armoured, she strode off along the corridor.

'Glad to see you didn't lose your temper with the man who went on about your hat,' said Nanny, running along behind.

'No point. He's going to be dead tomorrow.'

'Oh, dear. What of?'

'Run over by a cart, I think.'

'Why didn't you tell him?'

'I could be wrong.'

Granny reached the stairs and thundered down them.

'Where're we going?'

'I want to see who's behind those curtains.'

The applause, distant but still thunderous, filled the stairwell.

'They certainly like Agnes's voice,' said Nanny.

'Yes. I hopes we're in time.'

'Oh, bugger!'

'What?'

'I left Greebo up there!'

'Well, he likes meeting new people. Good grief, this place is a maze.'

Granny stepped out into a curved corridor, rather plusher than the one they had left. There was a series of doors along it.

'Ah. Now, then...'

She walked along the row, counting, and then tried a handle.

'Can I help you, ladies?'

They turned. A little old woman had come up softly behind them, carrying a tray of drinks.

Granny smiled at her. Nanny Ogg smiled at the tray.

'We were just wondering,' said Granny, 'which person in these Boxes likes to sit with the curtains nearly shut?'

The tray began to shake.

'Here, shall I hold that for you?' .said Nanny. 'You'll spill something if you're not careful.'

'What do you know about Box Eight?'said the old lady.

'Ah. Box Eight,' said Granny. 'That'd be the one, yes. That's this one over here, isn't it... ?'

'No, please...'

Granny strode forward and grasped the handle.

The door was locked.

The tray was thrust into Nanny's welcoming hands. 'Well, thank you, I don't mind if I do...' she said.

The woman pulled at Granny's arm. 'Don't! It'll bring terrible bad luck!'

Granny thrust out her hand. 'The key, madam!' Behind her, Nanny inspected a glass of champagne.

'Don't make him angry! It's bad enough as it is!' The woman was clearly terrified.

'Iron,' said Granny, rattling the handle. 'Can't magic iron...'