‘Amazing.’

Tanzie pulled a bit at Mum’s hand so that they could get to the head’s office faster. ‘Do you think Norman will miss me when I’m doing the long days?’

‘The long days.’

‘St Anne’s doesn’t finish till six. And there’s maths club on Tuesdays and Thursdays so I’d definitely want to do that.’

‘Tanze,’ she said, and stopped.

‘Mum. Look.’ There was a girl walking along reading a book. Actually reading a book. Nicky said if you walked across the playground reading a book at McArthur’s you got battered. You had to hide them, like cigarettes.

Her mother glanced at her. She looked really tired. She was always tired, these days. She put on one of those smiles that wasn’t really a smile at all, and they went in.

‘Hello, Mrs Thomas. Hello, Costanza. It’s very good to meet you. Do sit down.’

The headmaster’s study had a high ceiling, as white and perfectly decorated as a wedding cake. Little white plaster rosettes sat every twenty centimetres, and tiny rosebuds exactly halfway between them. The room was stuffed with old furniture and through a large bay window a man on a roller could be seen travelling up and down a cricket pitch. On a small table somebody had laid out a tray of coffee and hand-made biscuits. It took Tanzie a few minutes to realize they were for them. ‘Can I have one?’ she said, and the headmaster pushed them towards her.

‘Of course.’

‘Mouth closed,’ Mum murmured.

They were so good. You could tell they were homemade. Mum used to make biscuits before Dad left and they were just like these. She sat down on the edge of the sofa and gazed at the two men opposite. The one with the moustache smiled like the nurse did before she gave you an injection. Mum had pulled her bag onto her lap and Tanzie could see her holding her hand over the corner where Norman had chewed it. Her leg was jiggling.

‘This is Mr Cruikshank. He’s the head of maths. And I’m Mr Daly. I’ve been head here for the past two years.’

She shook their hands and smiled back. Tanzie should have shaken their hands, but all she could hear were the words ‘head of maths’. She looked up from her biscuit.

‘Do you do chords?’

‘We do.’

‘And probability?’

‘That too.’

Mr Cruikshank leant forward. ‘We’ve been looking at your test results. And we think, Costanza, that you should sit your GCSE in maths next year and get it out of the way. Because I think you’d rather enjoy the A-level problems.’

She looked at him. ‘Have you got actual papers?’

‘I’ve got some next door. Would you like to see them?’

She couldn’t believe he was asking. She thought briefly of saying, ‘Well, DUH’, like Nicky did. But she just nodded.

Mr Daly handed Mum a coffee. ‘I won’t beat around the bush, Mrs Thomas. You are well aware that your daughter has an exceptional ability. We have only seen scores like hers once before and that was from a pupil who went on to be a fellow at Trinity.’

Tanzie nodded, although she was pretty sure she didn’t want to be a fellow. Everyone knew girls were better at maths.

He went on and on then. She tuned out a bit because she was trying to see how many biscuits she could eat so what she heard was ‘… for a very select group of pupils who have a demonstrably unusual ability we have created a new equal-access scholarship.’ Blah, blah, blah. ‘It would offer a child who might not otherwise get the advantages of a school like this the chance to fulfil their potential in …’ Blah, blah. ‘While we are very keen to see how far Costanza could go in the field of maths, we would also want to make sure that she was well rounded in other parts of her student life. We have a full sporting and musical curriculum.’ Blah, blah, blah … ‘Numerate children are often also able in languages …’ blah, blah ‘… and drama – that’s often very popular with girls of her age.’

‘I only really like maths,’ she told him. ‘And dogs.’

‘Well, we don’t have much in the way of dogs, but we’d certainly offer you lots of opportunities to stretch yourself mathematically. But I think you might be surprised by what else you enjoy. Do you play any instruments?’

She shook her head.

‘Any languages?’

The room went a bit quiet.

‘Other interests?’

‘We go swimming on Fridays,’ Mum said.

‘We haven’t been swimming since Dad left.’

Mum smiled, but it went a bit wonky. ‘We have, Tanzie.’

‘Once. May the thirteenth. But now you work on Fridays.’

Her smile went really strange then, like she couldn’t hold the corners of her mouth up properly.

Mr Cruikshank left the room, and reappeared a moment later with his papers. She stuffed the last of the biscuit into her mouth, then got up and went to sit next to him. He had a whole pile of them. Stuff she hadn’t even started yet!

She began going through them with him, showing him what she had done and what she hadn’t, and in the background she could hear Mum and the headmaster’s voices rumbling away. ‘We’re very conscious of the pitfalls, psychological and otherwise, that can occur if children are only encouraged to go in one direction … blah, blah, blah … If Costanza comes to us, while we would consider her mathematical ability an asset, her pastoral care would be …’

It sounded like it was going all right. Tanzie let her attention travel to what was on the page. It might have been renewal theory. ‘Yes,’ Mr Cruikshank was saying quietly, his finger on the page. ‘But the curious feature of renewal processes is that, if we wait some predetermined time and then observe how large the renewal interval containing it is, we should expect it to be typically larger than a renewal interval of average size.’

She knew about this! ‘So the monkeys would take longer to type Macbeth?’ she said.

‘That’s it.’ He smiled. ‘I wasn’t sure you’d have covered any renewal theory.’

‘I haven’t, really. But Mr Tsvangarai told me about it once and I looked it up on the Internet. I liked the whole monkey thing.’ She flicked through the papers. There was tons of it. The numbers sang to her. She could feel her brain sort of humming she wanted to read them so much. She knew she had to go to this school. ‘Mum,’ she said. She didn’t usually interrupt, but she was too excited and forgot her manners. ‘Do you think we could get some of these papers?’

Mr Daly looked over. He didn’t seem to mind about the missing manners. ‘Mr Cruikshank, have we any spares?’

‘You can take these.’

He handed them over! Just like that! Tanzie began flicking through them. Outside a bell rang and she could hear children walking past the office window, their feet crunching on the gravel. She poked her head up to look at them. She wanted to see if any others were reading books.

‘So … what happens next?’

‘Well, we’d like to offer Costanza … Tanzie … a scholarship.’ He lifted a glossy folder from the table. ‘Here’s our prospectus, and the relevant documentation. The scholarship covers ninety per cent of the fees. It’s the most generous scholarship this school has ever offered. Usually fifty per cent is our maximum, given the extensive waiting list of pupils hoping to come here. The new scholarship is designed to recognize children with unusual levels of ability.’

‘Like me,’ Tanzie said.

‘Like you.’ He held out the plate towards her. Somehow they had replaced the biscuits on the plate with new ones. This really was the greatest school ever.

‘Ninety per cent,’ Mum said. She put her biscuit back on her saucer.

‘I do appreciate that there is still a considerable financial commitment involved. And there would also be uniform and travel costs, and any extras she might want, like music or school trips. But I would like to stress that this is an incredible opportunity.’ He leant forward. ‘We would love to have you here, Tanzie. Your maths teacher says you’re a joy to work with.’

‘I like school,’ she said, reaching for another biscuit. ‘I know lots of my friends think it’s boring. But I prefer school to home.’

They all laughed awkwardly.

‘Not because of you, Mum,’ she said, and helped herself to another. ‘But my mum does have to work a lot.’

Everyone went quiet.

‘We all do, these days,’ said Mr Cruikshank.

‘Well. It’s a lot for you to think about. And I’m sure you have other questions for us. But why don’t you finish your coffee, while we talk, and then I’ll get one of our pupils to show you around the rest of the school? Then you can discuss this between yourselves.’

That evening Mum went up to Nicky’s room and got him to hook the computer up to Skype. Every Sunday she would text Dad half an hour before, and he would set up the computer at Grandma’s so that Tanzie could speak to him. She would sit at Nicky’s desk and try not to be distracted by the little image of herself in the corner. It always made her look like she had a really weird-shaped head.

Except it wasn’t Sunday.

Tanzie was downstairs in the garden throwing a ball for Norman. She was determined that one day he would fetch it and bring it back. Tanzie had read somewhere that repetition increases the probability of an animal learning how to do something by a factor of four. She wasn’t sure Norman could count, though.

They had got Norman from the animal shelter when Dad first left and Mum stayed awake for eleven nights in a row worrying that they would be murdered in their beds once everyone realized he’d gone. Brilliant with kids, a fantastic guard dog, the rescue centre said. Mum kept saying, ‘But he’s so big.’

‘Even more of a deterrent,’ they said, with cheery smiles. ‘And did we mention he’s brilliant with kids?’