‘Not at all,’ Hattie said. ‘She was really interested. And interesting. She said when she was growing up in Whalsay there’d been a legend about a big house that had once been at Lindby, built by the son of a fisherman. It’s the sort of folk tale that might have its root in reality.’

‘Aye well.’ Evelyn stood up briskly. ‘You don’t want to believe everything Mima told you. She was a great one for stories. She might have remembered a few snatches from what her grandmother told her and made up the rest. I’d never heard anything about a big house at Setter. She was a bit of a romantic, was Mima.’

‘That’s what I liked about her, I think,’ Hattie said. She broke off a piece of the scone on her plate and crumbled it in her fingers. Perez thought she’d just taken the scone to be polite. None of it had got as far as her mouth. She looked up suddenly and frowned. ‘Mima seemed shocked when we found the skull. Didn’t you think so, Evelyn?’

‘Maybe she’d started to believe her own scary stories,’ Evelyn said. ‘Maybe she thought it was the work of the trows.’

Perez thought Hattie was going to say more about the skull, but she changed the subject. ‘I hope Ronald doesn’t get charged,’ she said. ‘Mima wouldn’t have wanted that.’

Perez wondered why it seemed to matter to her so much. She’d only been here for a couple of months. Whilst she’d obviously been fond of Mima, the other people in the drama could hardly be more than names to her. ‘How well do you know him?’

She shrugged. ‘I’ve seen him a few times in the bar of the Pier House Hotel. He did history at university and knows a lot about the myths and legends of the islands. He seems quite interested in the project and last season he came out to visit the site a few times. We ’ve tried to involve local people. That’s a prerequisite of work in Shetland. Val Turner insists that we explain what we’re doing to the community and include them as much as possible. Anna seems keen too.’

‘Poor Anna,’ Evelyn said. She stood up and took the empty mugs to the sink for washing up. Perez expected her to elaborate, but suddenly she turned back to Hattie. ‘Where’s Sophie? You should have brought her in for some tea. Sandy would have been pleased to see her again.’

Perez watched Sandy turn pink. Even when you’d grown up mothers had the knack of embarrassing you. His own was just the same.

‘Sophie’s gone into Lerwick for the day.’ Hattie’s voice was bland but Perez thought he could hear a trace of disapproval. ‘Paul’s going south on the ferry tonight and he’s offered her a lift into town.’