“Once Maurice appeared at the door of the Carrington Mews cottage Digby’s part was relatively simple. The swift knockout blow, too slight to leave a mark but heavy enough to be effective, wasn’t difficult for a man who had once been a boxing champion. The adaptations to the sidecar to convert it into a travelling coffin had been an easy matter for one who had built Sheldrake single-handed. The sidecar was ready and waiting and there was access to the garage from the house. The slight body, unconscious and breathing stertorously-for Lily had done her part well and Maurice had drunk far more wine than was good for him-was slid into the sidecar and the top nailed in place. There were, of course, air holes in the sides. It was no part of my plan that he should suffocate. Then Digby drank his half-bottle of whisky and set out to provide himself with his alibi. We couldn’t know precisely when it would be required, of course, and this was a slight worry. It would be a pity if Maurice died too soon. That he would die, and die in torment, was certain. It was merely a question of how long that torment would last and when it would begin. But I instructed Digby to get himself arrested as soon as he was a safe distance from home.
“Later next morning, as soon as he was released, Digby set out with the motorcycle and sidecar for Monksmere. He didn’t look at the body. I had instructed him not to open the sidecar but I doubt whether he was tempted. He was still living in the comfortable, imaginary world of the plot which I had created for him. I couldn’t foresee how remarkably he would react when he could no longer pretend to believe in it. But when he set out secretly from Carrington Mews that morning I have no doubt that he felt as innocently excited as a schoolboy whose practical joke is going well. There was no trouble on the journey. The black plastic driving suit, the helmet and goggles were a perfect disguise as I had known they would be. He had a single ticket to Saxmundham from Liverpool Street in his pocket and before leaving the West End he posted to Seton House my description of the Cortez Club. It seems almost unnecessary to say that a typing style can easily be disguised but not the typewriter used. I had typed the passage some weeks earlier on Maurice’s machine wearing a glove on my right hand and with bandaged left fingers. The passage about the mutilated body floating out to sea had been typed by Maurice and was taken by me from his papers. Using it was one of the small but agreeable refinements which I had incorporated into my plan when I learned about Miss Calthrop’s idea for an effective opening for one of Maurice’s books. It was in every sense a gift to me as well as to Maurice. To a large extent it determined the whole shape of the murder plot, and I made use of it brilliantly.
“But there was one vital part of my plot which I haven’t yet mentioned. Strangely enough, although I expected it to be the most difficult, it was the easiest of all. I had to make Digby Seton marry me. I thought that bringing him to this might take weeks of skilful persuasion. And I didn’t have those weeks. All the planning had to be done in those rare weekends when he was at Monksmere. I let him write to me because I could be sure that the letters would be burnt, but I never wrote to him and we never telephoned each other. But persuading him to this disagreeable and yet essential part of the plan wasn’t the kind of thing I could do by post. I even wondered whether this would be the rock on which the whole scheme would be wrecked. But I misjudged him. He wasn’t entirely stupid. If he had been I would never have risked making him a partner in his own destruction. He could recognise the inevitable. And after all, it was in his own interest. He had to marry to get his hands on the money. There was no one else he wanted. He certainly wasn’t keen on a wife who would make demands on him or interfere in his life, a wife who might even want to sleep with him. And he knew that he had to marry me for one overriding reason. No one would be able to prove that we killed Maurice unless one of us talked. And a wife can’t be made to give evidence against her own husband. It was arranged, of course, that we would divorce after a reasonable time and I was very generous about the marriage settlement. Not suspiciously generous. Just very very reasonable. I could afford to be. He had to marry me to keep me quiet and collect the cash. I had to marry him because I wanted the whole of his fortune. As his widow.
“We married by licence on fifteenth March at a London Registry Office. He hired a car and called for me early. No one saw us leaving the cottage. How could they? Celia Calthrop was away so there was no chance of her calling for me. Oliver Latham and Justin Bryce were in London. I neither knew nor cared whether Jane Dalgliesh was at home. I telephoned Maurice to say that I wasn’t well enough to report for work. He was irritated but he wasn’t concerned, and I had no fear that he might call at the cottage to see how I was. Maurice hated illness. He would care if his dog were sick. But then, he was fond of his dog. I find it very satisfying that he might be alive now if only he had cared enough to call at Tanner’s Cottage that day, to wonder where I had gone-why I had lied.
“But time and this tape are running out. I have settled my account with Maurice Seton. This is my triumph not my justification and there is still much to be told.
“Digby, driving the motorcycle and sidecar, arrived at Tanner’s Cottage just before six o’clock on Wednesday. It was dark by then and there was no one about. There never is once dusk has fallen on this coast. Maurice was dead, of course. Digby’s face was very white under the helmet as he prised off the lid of the sidecar. I think he had expected to see his victim’s face contorted into a grimace of horror, the dead eyes glaring accusingly. Unlike me he hadn’t read Maurice’s textbooks on forensic medicine. He didn’t know about the relaxing of muscles after death. The calm face, so ordinary, so vacuous, so completely without the power to be either frightening or pathetic seemed to reassure him. But I had forgotten to explain about rigor mortis. He hadn’t expected that we should need to break the rigor in the knees so that the body could be fitted into my wheelchair and taken down to the shore. He didn’t enjoy that necessary bit of business. I can still hear his high nervous giggle at the sight of Maurice’s thin legs, clad in those ridiculous trousers and sticking straight out like the broomstick legs of a Guy. Then Digby hit them and the rigor broke and they dangled and swung above the footrest like the legs of a child. That small act of personal violence to the body did something to Digby. I was perfectly ready to take off the hands myself. I wanted to bring that chopper down. But Digby took it from me and waited without speaking while I laid out the hands ready for him on the thwart. I might have made a neater job of it. I doubt whether I would have enjoyed it any more than he. Afterwards I took the hands from him and put them in my mackintosh toilet bag. Digby had a use for them; he was determined to send them to Luker. But there were things I had to do to them first in the privacy of my dark room. In the meantime I slung the bag around my neck and enjoyed the feel of those dead hands, seeming to creep against my flesh.