They sit in silence for a moment before Jamie breaks it.

‘Back to work?’

‘Yes.’

Archer’s phone rings from the pocket of her coat. She pulls it out but it slips from her hand and falls at Jamie’s feet.

He reaches down for it and hands it across. Quinn’s name is on the screen, distorted through the cracked glass.

‘Apple will fix that for you at a nominal cost,’ says Jamie.

‘It’s on my to-do list.’

Archer swipes the phone and feels the top layer of skin on her finger peel. Fortunately, it’s not cut.

‘Archer.’

‘Just wanted to let you know we’ve been to the locations of Stan Buxton and Noel Tipping’s spray paintings. One in Islington, the other in Angel. There’s nothing that stands out; they are similar to Billy Perrin’s. Apart from their faces, the bodies look as if they have been sprayed on with a stencil.’

‘That would have made them quicker to do.’

‘Exactly. Also, both are in obscure backstreets hidden from CCTV.’

‘Any witnesses?’

‘None yet. Phillips and Tozer are doing a door-to-door.’

Archer sighs. ‘OK. Thanks for the update.’

‘Two other things. Os matched a close-up of the woman in the killer’s The Reader video to a missing person. Her name is Hilary Richards. Hicks and Felton are following up. Also we had a call from a Lucy Robinson who claims her brother is in one of @nonymous’s YouTube videos.’

Archer perks up. ‘Which one?’

‘The one of the bloke sitting in the kitchen when the weird mask with the “@” symbol appears in the window.’

‘I know the one.’

‘Anyway, apparently he’s been missing for three weeks.’

‘Shit!’

‘I’m going to talk to her. Do you want me to wait for you?’

‘Please.’

‘OK. Klara mentioned your grandad is in hospital. How’s he doing?’

‘He’s doing OK, thanks. Listen . . . I’m sorry about your son.’

‘It’s OK. I should have mentioned it this morning, but sometimes I just can’t acknowledge it out loud that he is gone. Forever.’

‘I understand.’

‘Thanks ma’am. See ya soon.’

‘Bye.’

Archer slips the phone into her pocket.

‘Jake mentioned you are a detective,’ says Jamie.

‘What else did he tell you?’

‘Ah, I would hate to betray a confidence.’

Archer feels irrationally irritated but says nothing.

‘I’m teasing. It was all good stuff. He’s very proud of you.’

Archer stares at the passing traffic and makes a silent prayer that Grandad will be OK.

‘If you don’t mind me saying . . .’

She turns to look at Jamie.

‘I don’t mean to be forward, but . . . Jake told me you have one blue eye like a sapphire, and one green eye like an emerald.’

Archer looks back at the traffic. ‘He has quite an imagination. It was more noticeable when I was younger, not so much now.’

‘I noticed them under the bright lights of the ward.’