No longer set apart by police tape and massing journalists, number 18 had faded back into graceful conformity with its neighbours.

‘The balcony she fell from was on the top floor,’ said Strike, ‘about forty feet up, I’d say.’

He contemplated the handsome frontage. The balconies on the top three floors, Robin saw, were shallow, with barely standing room between the balustrade and the long windows.

‘The thing is,’ Strike told Robin, while he squinted at the balcony high above them, ‘pushing someone from that height wouldn’t guarantee death.’

‘Oh – but surely?’ protested Robin, contemplating the awful drop between top balcony and hard road.

‘You’d be surprised. I spent a month in a bed next to a Welsh bloke who got blown off a building about that height. Smashed his legs and pelvis, lot of internal bleeding, but he’s still with us.’

Robin glanced at Strike, wondering why he had been in bed for a month; but the detective was oblivious, now scowling at the front door.

‘Keypad,’ he muttered, noting the metal square inset with buttons, ‘and a camera over the door. Bristow didn’t mention a camera. Could be new.’

He stood for a few minutes testing theories against the intimidating red-brick face of these fantastically expensive fortresses. Why had Lula Landry chosen to live here in the first place? Sedate, traditional, stuffy, Kentigern Gardens was surely the natural domain of a different kind of rich: Russian and Arab oligarchs; corporate giants splitting their time between town and their country estates; wealthy spinsters, slowly decaying amidst their art collections. He found it a strange choice of abode for a girl of twenty-three, who ran, according to every story Robin had read out that morning, with a hip, creative crowd, whose celebrated sense of style owed more to the street than the salon.

‘It looks very well protected, doesn’t it?’ said Robin.

‘Yeah, it does. And that’s without the crowd of paparazzi who were standing guard over it that night.’

Strike leaned back against the black railings of number 23, staring at number 18. The windows of Landry’s former residence were taller than those on the lower floors, and its balcony, unlike the other two, had not been decorated with topiary shrubs. Strike slipped a packet of cigarettes out of his pocket and offered Robin one; she shook her head, surprised, because she had not seen him smoke in the office. Having lit up and inhaled deeply, he said, with his eyes on the front door:

‘Bristow thinks someone got in and out that night, undetected.’

Robin, who had already decided that the building was impenetrable, thought that Strike was about to pour scorn on the theory, but she was wrong.

‘If they did,’ said Strike, eyes still on the door, ‘it was planned, and planned well. Nobody could’ve got past photographers, a keypad, a security guard and a closed inner door, and out again, on luck alone. Thing is,’ he scratched his chin, ‘that degree of premeditation doesn’t fit with such a slapdash murder.’