It came out, just as Ciara had described, like a metal-edged scarf, exposing the rough interior of the white leather. Nothing was visible inside until he looked more closely, and then he saw the line of pale blue running down the side of the stiff rectangular cloth-covered board holding the base of the bag in shape. He lifted up the board and saw, beneath it, a folded piece of pale blue paper, scribbled all over in an untidy hand.

Strike replaced the bag swiftly on the shelf with the lining bundled inside, and took from an inside pocket of his jacket a clear plastic bag, into which he inserted the pale blue paper, shaken open but unread. He closed the mahogany door and continued to open others. Behind the penultimate door was a safe, operated by a digital keypad.

Strike took a second plastic bag from inside his jacket, slid it over his hand and began to press keys, but before he had completed his trial, he heard movement outside. Hastily thrusting the crumpled bag back into a pocket, he closed the wardrobe door as quietly as possible and walked back into the bedroom, to find the Macmillan nurse bending over Yvette Bristow. She looked around when she heard him.

‘Wrong door,’ said Strike. ‘I thought it was the bathroom.’

He went into the small en-suite, and here, with the door closed, before flushing the toilet and turning on the taps for the nurse’s benefit, he read the last will and testament of Lula Landry, scribbled on her mother’s writing paper and witnessed by Rochelle Onifade.

Yvette Bristow was still lying with her eyes closed when he returned to the bedroom.

‘She’s asleep,’ said the nurse, gently. ‘She does this a lot.’

‘Yes,’ said Strike, the blood pounding in his ears. ‘Please tell her I said goodbye, when she wakes up. I’m going to have to leave now.’

They walked together down the comfortable passageway.

‘Lady Bristow seems very ill,’ Strike commented.

‘Oh yes, she is,’ said the nurse. ‘She could die any time now. She’s very poorly.’

‘I think I might have left my…’ said Strike vaguely, wandering left into the yellow sitting room he had first visited, leaning over the sofa to block the nurse’s view and carefully replacing the telephone receiver he had taken off the hook.

‘Yes, here it is,’ he said, pretending to palm something small and put it in his pocket. ‘Well, thanks very much for the coffee.’

With his hand on the door, he turned to look at her.

‘Her Valium addiction’s as bad as ever, then?’ he said.

Unsuspicious, trusting, the nurse smiled a tolerant smile.

‘Yes, it is, but it can’t hurt her now. Mind you,’ she said, ‘I’d give those doctors a piece of my mind. She’s had three of them giving her prescriptions for years, from the labels on the boxes.’