Across the top: big black letters, fantasy-book curlicues. THE SECRET PLACE.

Under that, smaller, no fancy font here: Welcome to The Secret Place. Please remember that respect for others is a core school value. Do not alter or remove others’ cards. Cards that identify anyone, as well as offensive or obscene cards, will be removed. If you have any concerns about a card, speak to your class teacher.

I had to shut my eyes for a second before they could start splitting the frenzy into individual cards. Black Labrador: I wish my brothers dog would die so I could get a kitten. Index finger: STOP PICKING YOUR NOSE AFTER LIGHTS OUT I CAN HEAR YOU!!! Cornetto wrapper stuck down with Sellotape: This was when I knew I love u . . . and I’m so scared u know too. Tangle of algebra equations, cut out and glued on top of each other: My freind lets me copy cos I’m never goin 2 understand dem. Coloured-pencil drawing of a soother-faced baby: Everyone blamed her brother but I’m the one who taught my cousin to say F*** off!

Conway said, ‘“The card was pinned over one that has half a postcard of Florida on top and half a postcard of Galway on the bottom. It says, I tell everyone this is my favourite place ’cause it’s cool . . . This is my actual favourite place ’cause no one here knows I’m supposed to be cool. I like Galway too, so sometimes I look at it when I go past. That’s why I noticed the picture of Chris.’”

It took me a second to cop. Holly’s statement; word for word, near as I could make out. Conway caught the startled look, gave me a sarky one back. ‘What, you thought I was thick?’

‘Didn’t think you had a memory like that on you.’

‘Live and learn.’ She leaned back from the board, scanning.

Big red-lipsticked mouth, teeth bared: My mother hates me because I’m fat. Darkening blue sky, soft green hillsides, one golden-lit window: I want to go home I want to go home I want to go home. Downstairs, the same delicate curve of madrigal, over and over.

‘There,’ said Conway. She nudged aside a photo of a man cleaning an oil-stained seagull – You can keep telling me to be a solicitor but I’m going to do THIS! – and pointed. Half Florida, half Galway. Left-hand side of the board, near the bottom.

Conway bent close. ‘Pinhole,’ she said. ‘Looks like your little pal didn’t make the whole thing up.’

If she had, she wouldn’t have forgotten the pinhole; not Holly. ‘Looks like.’

No point taking it for prints; anything proved nothing. Conway said, quoting again, ‘“I didn’t look at the Galway card yesterday evening when we were in the art room. I don’t remember when was the last time I looked at it. Maybe last week.”’

‘If the teachers on monitoring duty did their job, we’re down to whoever was in the building after class. Otherwise . . .’