You know perfectly well that in your heart you think the oddness in that case is of my making, and that it is all really as plain as the police reports. However, as I have begun, I will go on. But first we will have something to drink, and you may as well light your pipe.”

Dyson went up to the oak cupboard, and drew from its depths a rotund bottle and two little glasses, quaintly gilded.

“It’s Benedictine,” he said. “You’ll have some, won’t you?”

Salisbury assented, and the two men sat sipping and smoking reflectively for some minutes before Dyson began..”Let me see,” he said at lasts “we were at the inquest, weren’t we? No, we had done with that.

Ah, I remember. I was telling you that on the whole I had been successful in my inquiries, investigation, or whatever you like to call it, into the matter. Wasn’t that where I left off?”

“Yes, that was it. To be precise, I think ‘though’ was the last word you said on the matter.”

“Exactly. I have been thinking it all over since the other night, and I have come to the conclusion that that ‘though’ is a very big ‘though’ indeed. Not to put too fine a point on it, I have had to confess that what I found out, or thought I found out, amounts in reality to nothing. I am as far away from the heart of the case as ever. However, I may as well tell you what I do know. You may remember my saying that I was impressed a good deal by some remarks of one of the doctors who gave evidence at the inquest. Well, I determined that my first step must be to try if I could get something more definite and intelligible out of that doctor. Somehow or other I managed to get an introduction to the man, and he gave me an appointment to come and see him.

He turned out to be a pleasant, genial fellow; rather young and not in the least like the typical medical man, and he began the conference by offering me whisky and cigars. I didn’t think it worth while to beat about the bush, so I began by saying that part of his evidence at the Harlesden inquest struck me as very peculiar, and I gave him the printed report, with the sentences in question underlined. He just glanced at the slip, and gave me a queer look. ‘It struck you as peculiar, did it?” said he. ‘Well, you must remember that the Harlesden case was very peculiar. In fact, I think I may safely say that in some features it was unique—quite unique.’
‘Quite so,’ I replied, ‘and that’s exactly why it interests me, and why I want to know more about it. And I thought that if anybody could give me any information it would be you. What is your opinion of the matter?’
“It was a pretty downright sort of question, and my doctor looked rather taken aback.

” ‘Well,’ he said, ‘as I fancy your motive in inquiring into the question must be mere curiosity, I think I may tell you my opinion with tolerable freedom. So, Mr., Mr. Dyson? if you want to know my theory, it is this: I believe that Dr. Black killed his wife.’
” ‘But the verdict,’ I answered, ‘the verdict was given from your own evidence.’
” ‘Quite so; the verdict was given in accordance with the evidence of my colleague and myself, and, under the circumstances, I think the jury acted very sensibly. In fact, I don’t see what else they could have done. But I stick to my opinion, mind you, and I say this also. I don’t wonder at Black’s doing what I firmly believe he did. I think he was justified.’
” ‘Justified! How could that be?’ I asked. I was astonished, as you may imagine, at the answer I had got. The doctor wheeled round his chair and looked steadily at me for a moment before he answered.

” ‘I suppose you are not a man of science yourself? No; then it would be of no use my going into detail. I have always been firmly opposed myself to any partnership between physiology and psychology. I believe that both are bound to suffer. No one recognizes more decidedly than I do the impassable gulf, the fathomless abyss that separates the world of consciousness from the sphere of matter.