‘It can feel like that sometimes. But people have their jobs to do.’

‘Yes, I know. But it doesn’t really make it any better. Can I ask you something now?’

‘Go ahead, sir.’

‘Do you have any idea how the fire started?’

‘Not yet. We think the seat of the fire was downstairs in the sitting room, but we need to examine the house more closely before we can be sure about anything.’

Mr Lowther’s gaze drifted away again, and Fry’s attention was caught by the traffic on the A6. It had slowed suddenly as an unexpected type of vehicle mingled with the cars and vans, displaying an entirely different pattern of movement. Even through the double glazing, Fry thought she could hear the creak and rattle. For a moment, she wondered if Pride and Prejudice was being filmed again somewhere nearby.

‘A stagecoach has just gone past on the road down there,’ she said. ‘It was being pulled by four big grey horses.’

‘Yes, they’re Dutch Gelderlanders.’

Fry turned, surprised to see Mrs Lowther standing in the doorway, her eyes dried, her voice almost steady, as if she’d made a great effort to bring herself under control.

‘Beautiful, aren’t they?’ she said.

‘Right. You’ve seen them before, then?’

‘Sometimes there are two of them drawing a landau.’

Henry Lowther glanced at the window, but didn’t seem interested. ‘The fire must have been caused by faulty wiring or something, I suppose. They’ll find out what went wrong, won’t they?’

‘We don’t know yet whether it was an accident,’ said Fry.

But Lowther shook his head. ‘No, no. It can’t have been started deliberately. I might just about imagine one of the boys playing with matches. But not arson.’

‘We should know soon enough, Mr Lowther.’

‘You don’t understand. There’s no one who could have had any reason to start that fire deliberately,’ he said. ‘It just isn’t possible. Lindsay would never upset anybody. And as for Jack and Liam –’

He stopped, as if finding himself unable to express the impossibility in the case of his grandsons. His anguished expression suggested that the idea of harming them was physically beyond comprehension. His wife caught a surge of his emotion and began to cry all over again.

‘What about Brian?’

‘He wasn’t even at home,’ said Lowther.

Fry watched him, trying to detect an accusatory note in his voice. But perhaps it hadn’t occurred to the Lowthers yet that their son-in-law ought to have been at home with his family, should have been there to protect them, even if it meant he’d have died in the fire too. It would come later, that anger, the readiness to find someone to blame, if only for not being there.

‘Nevertheless, do you think there might be anybody he could have got on the wrong side of? Someone who might want to take revenge on him?’