The pathologist was able to confirm that all the mutilations on the body were caused by the action of the propeller and had nothing to do with the girl's death. She had been strangled but had not been dead, though possibly moribund, when she entered the water. Asked when death occurred, he refused to be more definite than not less than twelve, not more than twenty hours. Pressed, he became irritable and talked about special circumstances such as the high temperature of the canal water and the opening up of the chest and lungs by the propeller. Pascoe, long used to the imprecisions of science, had looked for other evidence of timing.

Twenty hours took him back to six-thirty P.M. on the Thursday. He was able to move forward to eight P.M. because that was when Brenda and Tommy had met. Their rendezvous had been at the Bay Tree Inn, a half-timbered former coaching inn not far from the city centre which had fallen into the hands of a large brewery group renowned for the acuteness of their commercial instincts and the awfulness of their keg beer. Now the Bay Tree's history attracted the tourist set, its twin restaurants (one expensive, one extortionate) attracted the dining set, and its cellar disco attracted the young set. Thus it was always packed. The meeting had been witnessed by Ron Ludlam, a workmate of Tommy's and one of the friends of whom Mr Sorby so fervently disapproved. He had been drinking with Tommy while he waited for Brenda. Brenda had not wanted to stay at the Bay Tree. Ron Ludlam who had accompanied the distraught Tommy home after the news of Brenda's death, said she seemed more interested in having a serious talk with her fiance about marital matters. Alone. They had gone off in the noisy, multicoloured mini.

According to Tommy they had spent the evening just driving around. Without stopping? Of course they had stopped, just parked out in the country to have a fag and a talk. Was that all? They might have played around a bit but nothing serious.