‘The keys to the lighthouse tower were kept in the kitchen,’ Perez said. ‘That’s where Fowler went to watch people moving around the island. Jane might have seen him take them or replace them. She searched his room. There was the draft of his original article about the possible search areas for the curlew. He’d brought it with him to confront Angela. She’d been reading it in the bird room and was frantic when Fowler took it back. Of course, she didn’t want anyone else to read it. It meant nothing to us, but Jane had spent a season in the field centre and understood the implication of it.’ He paused. He tried to imagine Jane’s exhilaration when she’d thought she’d put together the pieces. When was she planning to tell him?

‘She wasn’t foolish enough to confront Fowler with her suspicions?’ Rhona looked at her watch again. How much time had she allowed him? When was her next meeting due to begin?

‘No, Fowler went back to the North Light when Jane wasn’t expecting him. I think he saw her searching his things. It was partly my fault. It was the morning Angela’s body went out on the helicopter. I sent Sarah and Fowler away from the hall where I was conducting the interviews and told them to come back later. You can see into all the bedrooms as you come into the centre. The ground’s a bit higher there and there’s a perfect view into the rooms of the first floor. Jane wouldn’t have expected them back so soon.’

‘He killed her?’ Rhona said. ‘Just for that?’

‘By then,’ Perez said, ‘he’d lost all reason and all perspective. Perhaps she gave something of her suspicion away. The bookshop name would have intrigued her too and I’m sure she would have looked it up. Perhaps in his mind she was implicated in Angela’s betrayal just by being part of the field centre. The fact that the crime scene was decorated with feathers would indicate that. Fowler watched her from the lighthouse tower and saw her go towards the Pund. Jane knew Angela used it as a place to take her men and to keep her secrets. I guess she hoped to find more evidence of Fowler’s guilt there. He picked up a pillow from the laundry room, stuffed it into his day sack and hurried over the hill after her. At least, I’m guessing that’s what he did. You know more about it than I do. What does Sandy’s report say?’

‘You’re right,’ Rhona said. ‘Of course you’re right. You’re the best detective I’ve ever worked with, Jimmy.’ She looked up at him before continuing. ‘What happened then?’