‘I’d have to write the envelopes as well.’ William surprises himself by talking as though he is actually going to do it.

By the time Mr Hawthorn has given out prep questions, Martin has a list of boys to approach and William has a tangle of wire wool in his guts.

Mark Nettles is first, a tiny boy in the year above them. They are in the dorm, due at supper in ten minutes. Martin nods at Mark’s pocket.

‘Have you got everything? Sample writing? Note paper? Envelope?’

Mark nods back, his pointed face serious as he pulls out an envelope.

‘One of my mum’s letters is inside.’ He talks to Martin but passes it to William.

William can feel the spring of the folded letter squeezed into the envelope. He pulls it out and smooths it on the bed. The writing is a neat, italic script, not unlike his teacher in class two.

‘And I’ve written what I want you to say on the back of the envelope.’ Mark points.

William turns it over.

Dear Mr Atkinson,

Mark keeps feeling faint during evensong on Wednesday after rugby. Our doctor thinks if he doesn’t have to do Games he won’t feel faint and will sing better.

Yours sincerely,

Mrs Nettles.

William kneels down next to the bed, leaning the fresh paper on the dorm bible. ‘Tell me if you think I get anything wrong.’

‘Don’t worry, Mark, he won’t.’ Martin looks smug. William hopes he won’t let them all down.

It doesn’t take long and when it’s done, the boy’s face seems to lose its sharp edges and his eyes soften.

‘Brilliant!’ He stands holding the letter.

‘Hang on, I’ve got to address the envelope so you can post it from home.’

‘Impressive.’ Mark hands it back.

‘Get a move on, we’ve got to go and eat,’ Martin says.

‘Just think!’ Mark laughs as they leave the dorm. ‘No Games!’

‘And only half your tuck allowance for the first half of next term, plus this week’s.’ Martin pats Mark on the back.

As they walk into the dining hall and Cook’s face lifts ever so slightly when she sees him, William feels he’s crossed a threshold.

During the last week of term, he writes three more letters: one to get Charles out of dips due to a weak chest; one for Anthony, asking for bigger portions at lunch because the doctor says he’s too skinny; and finally for Martin (against William’s advice), whose mother demands that the tuck shop starts stocking shoe lace liquorice.