‘Do you want to come in for a bit?’ he said.

‘Sure.’

He could hardly believe that he’d asked her in. Even more alarming was the fact that she’d accepted. Cooper couldn’t get to grips with what was happening to him today. The world had taken a strange turn.

Inside the flat the cat padded forward to greet Cooper, then paused suspiciously before sitting down and staring at Fry.

‘I suppose you’ll have another funeral to go to soon,’ said Fry. ‘Your landlady.’

‘Mrs Shelley, yes. It’s next Monday.’

‘What’s going to happen to this house?’ asked Fry.

‘I think the nephew will sell them. He doesn’t want to be bothered dealing with pesky tenants. He’ll do them up and get a good price for them when he puts them on the market.’

‘But as a sitting tenant you have legal rights.’

‘I know, but…’

‘It won’t be the same?’

Cooper had thought it would sound odd to her if he’d said that himself. But she’d hit on what he was thinking exactly. He’d almost forgotten Fry’s ability to read his mind so well. It had never seemed like a positive asset before. But now her insight made it easier to explain his feelings. For once he felt she might actually understand what he meant.

‘No, it won’t be the same at all. In fact, it doesn’t feel the same now. Number six is empty already. They took Mrs Shelley’s dog away. I imagine he’s gone in a sanctuary or more likely he’s been taken to the vet’s to be put down. Well, he was quite old, I suppose.’

Cooper found Gavin Murfin drifting into his mind, remembered the impression he’d been given in Superintendent Branagh’s office that Murfin was regarded as an old dog past his day, a useless mutt who lay around sleeping and eating and was no good to anyone. At least there was a sanctuary for an aged copper.

He was still acting on instinct, following the accepted practices of hospitality, despite the unlikely presence of Diane Fry in his flat.

‘Would you like a drink?’ he said.

‘That would be good. What have you got?’

‘Oh. Well, there are some beers in the fridge. And I’ve got a bottle of cheap Australian white somewhere. That’s all, I’m afraid. I don’t entertain very often.’

‘It’s lucky I brought this, then,’ said Fry.

She opened her bag. Where Cooper had thought she was carrying reports back to Nottingham, the bag was heavy because it contained a bottle.

‘Champagne? Are you kidding?’ he said.

Fry held the bottle up and peered at the label. ‘Isn’t it a good one? I have no idea really.’

‘I’m sure it’s fine.’

‘Good.’

Cooper opened the bottle, poured them each a drink and put the bottle down on the coffee table. Fry had settled on his sofa and he sat down opposite her in the old armchair, with the cat rubbing anxiously against his legs.

‘Cheers,’ he said.

He watched Fry take a long gulp and cradle her glass, and found himself copying her. It was good champagne too, so far as he was any judge. There hadn’t been many occasions in his life to celebrate recently.

‘So what did you make of your little protest group in the end?’ asked Fry. ‘Poppy Mellor and her crew of armchair anarchists.’

‘They were a strange bunch,’ admitted Cooper. ‘But I think Poppy Mellor was right in something she said to me. They were like a family. They didn’t choose each other, but they were thrown together, almost against their will or their better instincts.’

‘Is that the way it happened?’

‘Of course,’ said Cooper. ‘Think of all the things that happen in people’s lives. Coincidence, fate, circumstances beyond their control. It’s all just the nature of events. They bring individuals close together and they pull them apart again.’

‘That’s very true. Very true.’

Fry got up and poured him a second glass. He seemed to have finished the first one very quickly. He always drank too fast when he was nervous.

He watched Diane Fry drifting around the room with her glass. It reminded him of the first time he’d ever set eyes on her, as she walked into the CID room at West Street. He’d just returned from leave and she was the new girl on a transfer from the West Midlands.

But then she stopped and reached out to straighten a picture on the wall. Cooper’s heart lurched. She’d effortlessly replaced that first memory with another one. The day he moved into this flat in Welbeck Street, Fry had turned up unexpectedly, the way she had last Friday. She’d even brought him a gift to welcome him into his new home. A small, decorative clock. It was standing on the mantelpiece now.

The rarity of that occasion made it all the more memorable for him. He’d witnessed a strange transformation that day, suddenly seeing a side of Fry that was usually hidden, the vulnerability behind the cynical façade. It was the Diane he’d been looking for, ever since she walked into West Street that first time, all those years ago.

‘So – you’ve been offered an inspector’s job?’ she said. ‘I hope I’m right. It’s the reason I brought the champagne, after all.’

‘Yes,’ said Cooper, with a guilty surge of triumph. ‘I’m sorry, and all that.’

She raised an eyebrow and put down her glass. ‘Sorry? Why?’

‘Well, I can’t imagine it’s what you wanted. You’ve been watching me so closely for the past few days, hoping I’d slip up. And then, in the end, I did what I never wanted to do. I had to ask you for help. It must have been satisfying for you.’

‘Is that what you think?’ said Fry. ‘Don’t you realise that I was asked to make an assessment? It was my input that helped you to get the job.’

‘Seriously?’

‘I’m always serious.’

Fry laughed then, as if she’d made a joke. That was twice Cooper had witnessed it. Something was definitely happening.

‘Well, I don’t know what to say. Except thank you, Diane.’

‘That’s okay.’

She took another drink and looked thoughtful. Cooper waited on tenterhooks for the next direction the conversation might be about to take.

‘I visited my sister in Birmingham the other night,’ she said. ‘You remember my sister, I’m sure.’

‘Angie?’

‘I only have the one.’

‘Is she well?’ said Cooper.

‘Amazingly well. Ridiculously well. You’d hardly recognise her. I certainly didn’t.’

‘That’s … good, I suppose.’

‘Yes. She’s deliriously happy in a new relationship. And now she’s pregnant.’

‘Pregnant? Really?’

‘That’s what I said. My big sis is having a baby.’

‘Good for her.’

‘Absolutely,’ said Fry. ‘Good for her. I hope she’s very happy.’ She tilted her head on one side and gave him a quizzical look. ‘But here we are, you and me, talking about murder. I suppose it’s whatever turns you on.’

Cooper was beginning to feel exactly the way he had with Poppy Mellor in the old cheese factory, trying to talk calmly to a woman whose behaviour had become unpredictable, who might do something completely unexpected at any moment.

‘We don’t have to talk about murder, if you don’t want to,’ he said.

‘No, we don’t. We could talk about something else. Any ideas, Ben?’

‘Er…’

‘No? That’s not like you.’

Fry seemed to be slightly tipsy. He’d never seen her this relaxed before. She was even saying things that didn’t make any sense.

‘But it’s strange, isn’t it?’ she said. ‘Strange that a corpse could turn out to be a bridge.’

‘You’re mad.’

But Cooper smiled. Wasn’t that exactly what had happened? A new sort of connection had formed between them with that first body lying in the shallow water of the River Dove. He hadn’t understood what it was until now. But it was true – a corpse might provide a bridge in a way. And more than that. Three corpses could be enough to carry you across a void, transporting you from one place to another. They could take you away from a world you didn’t want to be in to a different universe altogether. A place where … well, where anything could happen.