We had less than five minutes before the train was due to depart. We stood talking for a little with the door half-closed, Kenrick facing the corridor. Presently he said that he had better get out, or he might be carried to the Highlands. I indicated my small overnight case which was lying beside him on the bunk and said: ‘If you open my case you’ll find something in it for you. A keepsake till we meet again.’

He bent over, with an almost childish eagerness, to unfasten the two locks. The position was perfect. I took from my pocket the most satisfactory weapon ever devised by man for the destruction of his unsuspecting enemy. Primitive man in desert countries had neither knife nor rifle, but he made the sand serve. A rag and a few handfuls of sand, and a skull would crack like an egg-shell; very neatly it would crack, without blood or fuss. He gave a small grunt and fell forward over the case. I shut and locked the door and looked to see if his nose was bleeding. It was not. I dragged him off the berth and bundled him under it. This was my only miscalculation. One half of the space under the berth was occupied by some permanent obstruction, and thin and slight as he was his knees could not be pushed back out of sight. I took off my own coat and flung it on the berth so that it hung over and hid his legs. As I arranged the folds in a manner at once concealing and suitably casual, the whistle went. I put the outward half of my ticket to Scoone, together with my sleeper ticket, on the small shelf below the mirror where Yughourt would see it, and walked down the corridor to the lavatory. No one had interest for anything but the moment of leave-taking. I shut myself into the lavatory and waited.

About twenty minutes later I heard the successive closing of doors that meant that Yughourt was making his rounds. When I heard him in the compartment next door I began to wash, noisily. He tapped at the door a few moments later and asked if I were the passenger in B Seven. I said that I was. He announced that he had found my tickets and taken them. I heard him go through to the next coach and begin his door-slamming, and I walked back to B Seven and locked myself in.

After that I had three uninterrupted hours to make all perfect.

If you ever want to be sure of uninterrupted peace, my dear Mr Grant, buy yourself a sleeper ticket to the North of Scotland. There is nowhere in this world where one is so safe from interruption as one is in a sleeping compartment once the attendant has done his round. Not even in the desert.

I retrieved Kenrick from below the bunk, rubbed his head on the edge of the wash-hand basin, and laid him on the bunk. An examination of his clothes showed a gratifying cosmopolitanism. His underclothes seemed to be dhobi-washed, his suit made in Hong Kong, and his shoes in Karachi. His watch was a cheap metal one with neither name nor initials.

I removed the contents of his pockets and substituted Charles Martin’s pocket-book and its contents.

He was still alive, but he stopped breathing as we were running through the yards at Rugby.

From then on I dressed the set, as they say in the theatre. And I don’t think that I missed anything; did I, Mr Grant? The details were perfect, even to the crushed hairs in the wash-hand basin and the dusty palms of his hands. In the case that I was leaving behind were old clothes of my own, well-worn and washed, and of a type that he was in the habit of wearing; and such Frenchness as I had been able to supply from my own store: a novel and a Testament. The case also, of course, contained the all-important bottle.

Kenrick had an extraordinarily hard head. I refer to the matter of drink, of course, not to the results of sand-bagging. I had plied him with whisky at dinner, and had offered him a stirrup-cup of such dimensions that any other man would have blenched at the prospect. He did indeed look at the half-tumbler of neat whisky a little doubtfully, but, as I have said, he was always anxious to please me and he drank it down without protest. He remained sober; or to all appearances sober. But both his blood and his stomach would be whisky-sodden when he died.