They went to the big glass window near Arrivals and watched the plane come in, the people walking down the ladder and on to the Tarmac. Fran and Cassie were among the last off and Perez felt the quiver of anxiety in his stomach. Perhaps she wasn’t there. Perhaps at the last minute she’d changed her mind and decided the city suited her better.

‘That’s Gwen James,’ Sandy said. And although he couldn’t remember ever seeing her on the television, Perez thought he would have picked her out from the rest of the passengers. She wore a long black coat almost to her ankles, black boots. She carried a leather holdall and it seemed she had no other luggage, because she walked straight past the carousel to Sandy and held out her hand.

Perez had spoken to her the evening before and wanted to introduce himself, but at that point he was distracted by the sight of Fran and Cassie getting off the plane. Fran was grinning and waving like crazy. He waved back, tried not to beam like a madman. There was something about her not quite as he remembered. A different haircut, a new pair of baseball boots, pink and covered with sequins. He wondered if she’d wear them when he took her to Fair Isle and what his father would make of them.

‘This is my boss,’ Sandy was saying. ‘Jimmy Perez.’

‘We’ve talked on the phone.’ Gwen James had the same jazz singer’s voice that Perez remembered.

‘Are you sure you’re happy with everything we have planned?’ Perez couldn’t understand how she could be so poised, so calm.

‘I need to know what happened,’ she said.

‘The car’s outside,’ Sandy said awkwardly. ‘I’ll get you back to Whalsay.’

‘And I’ll see you again this evening, Inspector Perez?’

‘Oh yes, you’ll see me then.’

Sandy picked up her bag and started walking quickly to the exit. Suddenly Perez realized he was hoping to get the woman out of the terminal before Cassie bounded up to them with her chat and hugs. He didn’t want to distress Gwen James with memories of Hattie as a young girl. Oh Sandy, Perez thought, how you’ve grown up.

Cassie couldn’t wait for her bag to arrive. She climbed through the barrier and threw her arms around Perez’s waist. As he picked her up and lifted her into the air he saw Gwen and Sandy disappearing through the revolving door and into the car park.

‘So,’ he said. ‘Have you missed me?’

Then Fran came up to them too, dragging a huge suitcase, laden with carrier bags, and it was she who answered.

‘We haven’t, have we, Cass? Hardly at all.’

‘Yes we have. Mum told everyone how much she missed you. She was really boring. She kept saying she wanted to come home.’