“Adam has always been too controlled. He would never let off an airgun, or have an argument. He kept his resentment to himself.

“His attempt on Sally’s life was another attempt to protect himself. Our belief in his story depended on our being convinced that he was pushed. If we believed that he was pushed, our attention was directed away from Adam as the possible murderer. But Sally had seen Adam in Fenquay on the day of his supposed accident, and he was on his own. He also had a coil of nylon rope with him. In fact Sally didn’t see whether or not Adam had a companion, and she didn’t see the rope. But he didn’t know that.

“I think that he brooded about Sally spotting him in Fenquay and began to see her as a real threat. He was with us when we were discussing Sally’s relationship with Peter and decided to use that knowledge to lure her out on to the marsh. After I’d left him in the Windmill he went and sat on the shingle bank, and began talking to some young lads. There were a lot of strangers in Rushy that day, come to see the bee-eater. Adam pretended to be called Peter Littleton and asked one of the boys to give the message to Sally. Then he set off in the opposite direction, with Molly following him.”

He smiled at his wife.

“He gave me the slip,” she said ruefully. “I’m not as young as I was. I followed him inland, right out of the village. He took that narrow lane which goes to the church, and then turns into a footpath, and eventually joins the Dereham road. You know that all the roads out of Rushy climb a bit. I was getting short of breath. I stopped and looked back over Rushy and saw that the mist was moving in from the sea. When I looked back Adam seemed to have disappeared. I thought for a while that he was hiding, for a joke.

“Then I saw him running down the main road towards the marsh. I knew I’d never catch him, but I walked down the hill after him. I heard him, in fact, before I saw him. The track into the marsh forms a sort of embankment and he must have climbed down into the reeds. By that time I’d walked out of the sun into a thick mist, and he didn’t see me. I don’t think he would have noticed me anyway. He was talking to himself. It was quite horrible. I heard mud and shingle splashing into water. He must have climbed on to the track ahead of me. I suppose that he could hear Sally further on. Of course I had no idea she was there. You all know what happened next.”

Sally leant over and took Molly’s hand. Barnaby stirred and smiled. Peter took him and held the baby over his head. Barnaby giggled and pulled at Peter’s hair.