A nun – civvies and headgear and a grim puggy underbite – was supervising from a corner, letting them talk but keeping a tough eye on where the chat was going. For a second I was surprised at McKenna, delegating this, but then I copped. Day girls had got home, boarders had rung home. McKenna’s phone was going like goodo. She was up to her glasses in damage control.

Sooner not later, some pissed-off daddy with pull was going to ring the brass. The brass was going to ring O’Kelly. O’Kelly was going to ring Conway and take her head off.

‘Julia,’ Conway said, past the nun. ‘Let’s go.’

A beat, and then Julia got up and came. No glance back at her mates.

Their room was two doors down from Orla’s. It had that same feeling, left in a hurry: locker doors open, clothes dropped in the dash. This time, though, I knew straight off what bit belonged to who, no need to check the bedside photos. Bright red bed linen, vintage poster of Max’s Kansas City: Julia. Old-looking patchwork quilt, poem written out poster-size in careful art-project calligraphy: Rebecca. Hanging mobile made of curled silver forks and spoons, good black-and-white photo that looked like a rock against low sky, till you looked twice and it was an old man’s profile: Holly. And Conway had been bang on about Selena: no dreamcatcher, but over her bed was a print of some medium-quality old oil, unicorn bending to drink at a dark lake by moonlight. Conway caught it too. Her eyes met mine, and the shadow of a private grin flipped back and forth between us. Before I knew it, it felt good.

Julia bounced down on her bed, propped herself up on her pillow, hands behind her head. Stretched out her legs – she was in jeans, a bright orange T-shirt with Patti Smith on, hair down – and crossed her ankles. Nice and comfy. ‘Hit me,’ she said.

Conway didn’t fuck about with fairy tales this time. She whipped out the evidence envelope, dangled it from finger and thumb in front of Julia’s face. Stood over her and watched. I got out my notebook.

Julia took her time. Let Conway hold the bag while she read the book’s title. ‘Is this a hint? I should be more virtuous?’

Conway said, ‘Are we gonna find your prints on that?’

Julia pointed at the book. ‘You think this is my bedtime reading? Seriously?’

‘Cute. Don’t do that again. We ask, you answer.’

Sigh. ‘No you are not going to find my prints on this OK thank you for asking. The only way I read about saints is when I’m forced to for essays. And even then I do, like, Joan of Arc. Not some simpering wimp.’