“Ach! what is that you say? You accuse me? Again? But it is ridiculous–beneath contempt.” Poirot said sharply: “Be quiet. I am telling you what I thought at the time. Let us remain impersonal.” “He doesn’t mean he thinks it’s you now,” said Cornelia soothingly.
Poirot went on quickly.
“So it lay there–between Simon Doyle and Dr. Bessner. But what reason has Bessner to kill Linnet Doyle? None, so far as I know. Simon Doyle, then? But that was impossible!
There were plenty of witnesses who could swear that Doyle never left the saloon that evening until the quarrel broke out. After that he was wounded and it would then have been physically impossible for him to have done so. Had I good evidence on both those points? Yes, I had the evidence of Miss Robson, of Jim Fanthorp and of Jacqueline de Bellefort as to the first, and I had the skilled testimony of Dr. Bessner and of Miss Bowers as to the other. No doubt was possible.
“So Dr. Bessner must be the guilty one. In favour of this theory there was the fact that the maid had been stabbed with a surgical knife. On the other hand Bessner had deliberately called attention to this fact.
“And then, my friends, a second perfectly indisputable fact became apparent to me. Louise Bourget’s hint could not have been intended for Dr. Bessner, because she could perfectly well have spoken to him in private at any time she liked. There was one person, and one person only who corresponded to her necessity–Simon Doyle.t Simon Doyle was wounded, was constantly attended by a doctor, was in that doctor’s cabin. It was to him, therefore, that she risked saying those ambiguous words in case she might not get another chance. And I remember how she had gone on, turning t°him: ‘Monsieur, I implore you–you see how it is?
What can I say?’ And his answer, ‘My good girl, don’t be a fool. Nobody thinks you saw or heard anything. You’ll be quite all right. I’ll look after you. Nobody’s accusing you of anything.’ That was the assurance she wanted, and she got it!” Bessner uttered a colossal snort.
“Ach! it is foolish, that! Do you think a man with a fractured bone and a splint on his leg could go walking about the boat and stabbing people! I tell you, it was impossible for Simon Doyle to leave his cabin.”
Poirot said gently:
“I know. That is quite true. The thing was impossible. It was impossible–but it was also true! There could be only one logical meaning behind Louise Bourget’s words.
“So I returned to the beginning and reviewed the crime in the light of this new knowledge. Was it possible that in the period preceding the quarrels Simon Doyle had left the saloon and the others had forgotten or not noticed it? I could not see that that was possible. Could the skilled testimony of Dr. Bessner and Miss Bowers be disregarded? Again I felt sure it could not. But, I rememered, there was a gap between the two. Simon Doyle had been alone in the saloon for a period of five minutes, and the skilled testimony of Dr. Bessner only applied to the time after that period. For that period we had only the evidence of visual appearance, and though apparently that was perfectly sound, it was no longer certain. What had actually been seen leaving assumption out of the question?
“Miss Robson had seen Miss de Bellefort fire her pistol, had seen Simon Doyle collapse on to a chair, had seen him clasp a handkerchief to his leg and seen that handkerchief gradually soak through red. What had Mr. Fanthorp heard and seen? He heard a shot, he found Doyle with a red-stained handkerchief clasped to his leg. What had happened then? Doyle had been very insistent that Miss de Bellefort should be got away, that she should not be left alone. After that, he suggested that Fanthorp should get hold of the doctor.
“Accordingly Miss Robson and Mr. Fanthorp go out with Miss de Be!lefort and for the next five minutes they are busy on the port side of the deck. Miss Bowers’s, Dr. Bessner’s and Miss de Bellefort’s cabins are all on the port side. Two minutes are all that Simon Doyle needs. He picked up the pistol from under the sofa, slips out of his shoes, runs like a hare silently along the starboard deck, enters his wife’s cabin, creeps up to her as she lies asleep, shoots her through the head, puts the bottle that has contained the red ink on her washstand (it mustn’t be found on him), runs back, gets hold of Miss Van Schuyler’s velvet stole which he has quietly stuffed down the side of a chair in readiness, muffles it round the pistol and fires a bullet into his leg. His chair into which he falls (in genuine agony this time) is by a window. He lifts the window and throws the pistol (wrapped up with the tell-tale handkerchief in the velvet stole) into the Nile.”