Michael Reave shook his head slowly, still smiling. ‘You wanted me to tell you about your mum, didn’t you? She loved those stories. Back then, she loved the countryside like I did – wanted nothing more than to be under the sky, to walk in the woods. Those stories were, for her, a link to the time when that’s just what we did. When we were rightly afraid of the forest, and we knew the rhythms of the world. My point is, there’s likely a lot you didn’t know about your mum, lass. That’s what people are like. Lots of layers, some of them darker than others. Your mum, she was good at hiding things. Better than anyone.’

Heather realized that she had her hands clasped together tightly under the table, tight enough that her fingers were turning white. With some difficulty she untangled them. Her memories of the day at the mortuary seemed very close, as though she might turn to her right and see a cold white table, the cold white faces of the undertakers. She squeezed her hands into fists under the desk, concentrating on the dull pain of her nails digging into her palms.

‘The countryside, that’s right. In the letters you talk about a place where the two of you lived for a while, a sort of hippy commune up north. I thought that sort of thing died out in the Sixties, but it sounds like it went on for some years. Is that where you met? What can you tell me about it?’

Michael Reave looked down at the table. All of the animation that had entered his face while telling his grim fairy tale seemed to seep away.

‘I don’t see why I should talk about that. It’s all ancient history.’

‘Why not? Everyone getting back to nature, escaping the rat race and so on. In the letters you call it Fiddler’s Mill. What was it like?’

He turned his head to look at the far wall, just as though there was a window there he could gaze out of.

‘I think I’m done,’ he said quietly. ‘I think I want to go back to my cell now. No more talking for me.’ Heather blinked, surprised by his sudden change of attitude. As DI Parker touched her shoulder, inviting her to leave, Michael Reave met her eyes one last time. ‘Did you understand the story, Heather? Do you see what the sister should have done?’

Heather didn’t answer.

‘She should have drunk the water too,’ he said.