His phone buzzed, shattering his attempt to listen properly. He moved further up the track. Despite what Caroline had said about despising gossip, he wouldn’t put it past her to eavesdrop through the door.

It was Mary Lomax and her words were tumbling over themselves, so for a minute he couldn’t make out what she was telling him. Then she became more coherent and explained that David Gordon had run away and she didn’t know where he’d gone. Perez thought this was a complication he could do without: all these people wandering around in the dark, all tense and jumpy. But there was no point blaming the police officer, and he cut into her apologies.

‘I’d like you to do something for me, Mary. Make a few phone calls. I know it’s late, but I think these folk will be awake. This is what I’d like to know.’ He spoke carefully and sensed that she was steadying on the other end of the phone. ‘There’s no need to ring me back. Just send me a text with your answer. Is that OK?’

As he switched off his mobile he thought he could hear children singing, but the tune faded away immediately and it could have been his imagination, or a strange echo from the phone.

Then he was still, waiting for his eyes and ears to adjust again, as he tried to put himself in the footsteps of the killer.

He climbed the bank behind the house to the overgrown bones of the farmstead close to the loch where Eleanor’s body had been found. He’d seen George Malcolmson standing here when he and Willow had gone to look inside Utra. From there Perez thought he’d get a sense of the space all around and, when the sun rose, he’d have a view north along the shore. As he watched he saw flames. Someone had lit a bonfire on the beach, probably to celebrate midsummer and the tilting of the year towards winter. Sparks were shooting into the sky like fireworks or an emergency flare. Perhaps people who had been eating in the boat club had decided they would carry on partying. The thought reassured him. If there were other people around, then there was surely less danger of another murder.

His phone buzzed. A text from Mary with the answer to his questions. The words seemed domestic and normal in this wild setting.