‘Hood suggested Dr Castle should be sent for, but this was strenuously opposed by Kingman who dislikes doctors and is one of those people who go in for herbal remedies – raspberry leaf tablets and camomile tea and that sort of thing. Also he told Hood rather absurdly that Hannah had had quite enough to do with doctors and that if this wasn’t some gastric germ it was the result of her taking “dangerous” tranquillizers.

‘Hood thought Hannah was seriously ill and the argument got heated, with Hood trying to make Kingman either call a doctor or take her to a hospital. Kingman wouldn’t and Corinne took his part. Hood is one of those angry but weak people who are all bluster, and although he might have called a doctor himself, he didn’t. The effect on him of Corinne again, I suppose. What he did do was tell Kingman he was a fool to mess about cooking things everyone knew weren’t safe, to which Kingman replied that if the shaggy caps were dangerous, how was it they weren’t all ill? Eventually, at about midnight, Hannah stopped retching, seemed to have no more pain, and fell asleep. Hood drove Corinne home, returned to the Kingmans’ and remained there for the rest of the night, sleeping on their sofa.

‘In the morning Hannah seemed perfectly well, though weak, which rather upset Kingman’s theory about the gastric bug. Relations between the brothers-in-law were strained. Kingman said he hadn’t liked Hood’s suggestions and that when he wanted to see his sister he, Kingman, would rather he came there when he was out or in the shop. Hood went off home, and since that day he hasn’t seen Kingman.

‘The day after his sister’s death he stormed in here, told me what I’ve told you, and accused Kingman of trying to poison Hannah. He was wild and nearly hysterical, but I felt I couldn’t dismiss this allegation as – well, the ravings of a bereaved person. There were too many peculiar circumstances, the unhappiness of the marriage, the fact of Kingman rinsing those plates, his refusal to call a doctor. Was I right?’

Burden stopped and sat waiting for approval. It came in the form of a not very enthusiastic nod.

After a moment Wexford spoke. ‘Could Kingman have pushed her off that balcony, Mike?’

‘She was a small fragile woman. It was physically possible. The back of the flats isn’t overlooked. There’s nothing behind but the parking area and then open fields. Kingman could have gone up by the stairs instead of using the lift and come down by the stairs. Two of the flats on the lower floors are empty. Below the Kingmans lives a bedridden woman whose husband was at work. Below that the tenant, a young married woman, was in but she saw and heard nothing. The invalid says she thinks she heard a scream during the afternoon but she did nothing about it, and if she did hear it, so what? It seems to me that a suicide, in those circumstances, is as likely to cry out as a murder victim.’