Charlie followed her into a narrow hall which was as unattractive as the kitchen. The carpet had rotted away from the walls on both sides, and was patterned with red and brown swirls, apart from near the front door where it was black. The wallpaper had half peeled off the walls. It was dark beige with a few lighter streaks and patches; it might have been magnolia at one time. A small, low radiator had lost most of its dirty-grey chipped paint. Charlie stopped to look at the painting above it of a fat man, a woman and a boy of about fourteen or fifteen sitting round a small table. Only the boy was fully dressed; the other two were in dressing-gowns. The woman was small and slender with sharp, close-set features. She was shielding her eyes with her hands and looking down. Her posture suggested a headache. No, a hangover—there were empty bottles all over the table. A morning-after-a-heavy-night scene, Charlie guessed.

At the foot of the stairs was another picture of the same man and woman, this time without the boy. The woman was combing her hair in front of a mirror, wearing a strappy white nightie. Behind her, the fat man lay on a bed reading a tabloid newspaper.

Charlie was impressed. The paintings were too seedy to be conventionally appealing, but they had life in them, and seemed to create more energy in the hall than the shadeless bulb Mary had turned on as she passed. The colours were extraordinary—vivid without being in any way buoyant or heartening. The effect was one of grim cheerlessness exposed in the glare of a searchlight. ‘Are these yours?’ Charlie asked, guessing they must be.

Mary was halfway up the stairs. She made a noise that was hard to interpret. ‘I didn’t steal them, if that’s what you’re asking.’

‘No, I meant . . .’

‘No. They’re not mine.’

So she hadn’t misunderstood. She’d been playing for time.

At the top of the stairs there was another picture, and a further two on the landing: the woman and the boy sitting at opposite ends of a lumpy yellow sofa with a torn cover, not looking at each other; the man standing next to a closed door, his hand raised to knock, his mouth open. The third painting featured two different people: a young man and woman, both dark with heavy eyebrows and square foreheads, both overweight, playing cards at the same table that was in the picture downstairs.

Mary pushed open one of the three doors on the landing, stood back and gestured for Charlie to go in ahead of her. The front bedroom. Aidan Seed had told Simon he’d killed Mary in here, left her body in the centre of the bed. Charlie’s throat felt tight as she walked in. I’m being ridiculous, she told herself. Would Mary be opening the door if there were a corpse behind it?