‘But Angela did make contact with you later?’

‘Much later. Yes. I wrote to her twice a year with brief snippets of news. That I’d qualified as a teacher. With my address if I’d moved. New phone numbers. At Christmas and on her birthday. I always sent money. Not a great deal at first, but as much as I could afford. I never knew whether she received the letters, but Archie must have passed them on, because at last there was a reply. She was eighteen, just about to start university. She asked if we could meet.’ The woman paused. ‘I’m not quite sure what I was expecting. Perhaps not someone quite as big. It was ridiculous, but I still thought of her as a child. She was very assertive. Forceful. She knew just what she wanted. From her life and from me.’

‘What did she want from you?’

The woman paused.

‘At first she just wanted me to listen. To understand what I’d put her through. To be sorry. Of course I could see why she was angry. She told me what it was like growing up alone with her father. “I had no friends. How could you do that to me?” Her passion for natural history grew out of her loneliness, I think. At least when she was watching the wildlife around the house in Wales there was a connection with something living. She was always going to be a scientist of some persuasion; her father had brought her up to believe that anything other than rational thought was ludicrous. She developed projects of her own – a study of a family of badgers, for example. She watched them from when she was ten until she left school and talked about them at that first meeting. “People speak of badgers as if they’re playful children. They can be really aggressive.”’ Stella smiled. ‘She told me she’d learned a lot from badgers.’

‘So she studied biology at university?’

‘Ecology,’ she said. ‘Later a PhD. Research into wading birds.’

‘And she dropped contact with her father?’

‘Apparently.’

Perez replayed the conversation in his head. ‘You said at first she just wanted you to listen and to be sorry. What came later? What did she want then?’

‘Money.’ She looked up at him, seemed to feel a need to explain. ‘Not for things. Angela was always ambitious but never materialist. For experience. The experiences she’d missed out on when she was growing up with her father. I paid for travel mostly and always gave her as much as I could. It never stopped me feeling guilty, but it helped.’

‘So you developed a relationship,’ Perez said. ‘An understanding at least.’