‘Oh please.’ Sophie gave a shiver of anticipation. Perez thought he’d never met anyone quite so physical. Like a small child she communicated her thoughts through her body. ‘A large red wine.’ Then, sensing her friend’s disapproval, ‘Don’t look at me like that, Hat. It’s not as if we can get much done this afternoon. Really we need to wait for guidance from Paul and he won’t be here until tomorrow. And you must feel like celebrating. It’s what you’ve been dreaming of since the project started.’

‘What’s happened?’ Perez thought he’d have to continue the conversation. No good leaving it to Sandy, who was still staring, his mouth half open. Sophie was wearing a sleeveless vest with a scoop neck showing a lot of cleavage. Soon he’d be drooling.

‘Go on, Hat, you tell him. It’s your find.’

‘Let me get you a drink first.’ Perez stood up.

He thought Hattie would refuse. He sensed a real tension between her and her colleague. He couldn’t understand why Hattie had come. But at last she gave a quick smile. ‘All right then. Beer. A half. Sophie’s right: we are celebrating and Mima would have been excited.’ She sat on the bench seat and unlaced her boots, slipped them off so she was sitting in her stockinged feet. She pulled her feet underneath her and looked, Perez thought, like a trow, one of the mythical small men he’d heard stories about since he was a child.

When he returned with the drinks and Sophie had ordered food, Perez repeated his question. ‘So, what’s happened?’

Hattie took a deep breath. ‘I can hardly believe it. We ’ve been hoping that the dwelling on Mima’s land would turn out to be something grander than a croft and maybe we’ve found the proof. Look, let me put it in context . . .’ She leaned forward. ‘In the fifteenth century Shetland was a strong member of the Hanseatic League, a trading partnership, but there was a problem. The merchants in the islands were mostly German incomers. As the trading policy became more isolationist, the Germans left and there was nobody to take on that role. My thesis is that some of the more important Shetlanders became traders in their own right. There’s evidence that happened in Shetland mainland, but nothing so far here in Whalsay.’

She paused and looked at Perez to check that he was following. He nodded. Her voice was very precise, almost as if she was presenting to an academic audience. Perhaps she didn’t know how to speak to anyone else.