Unfolding it, he murmured: “Unexpected chap, Gethryn. This ought to be interesting.”

He read:—

“The Murder Of John Hoode

“Upon the morning of the 20th of August, 192–, I drove to the village of Marling in Surrey. By 9.30 a. m. I had gained admission to the house Abbotshall.

“Owing to circumstances which need not be set down here, and also, in a great measure, to the courtesy and assistance of Superintendent Boyd of Scotland Yard, I was able from the beginning to pursue unhampered my own investigations. The result of these I give below.

“(For reasons which must, I think, be obvious, I have divided this report into four parts. Also, I would point out that, for reasons equally evident, the steps in my deduction, reasoning—call it what you will—are not necessarily given here in their chronological order.)

I

“Immediately upon my arrival at Abbotshall, I spoke at some length with Superintendent Boyd, who gave me the history of the affair as obtained by him through close questioning of the inmates. It appeared then that with the exception of the butler, these one and all had alibis, complete in some cases and in others as nearly so as could be expected of persons who had not known beforehand that they were like to be accused of murder. (Later, of course, it was revealed—see reports of the inquest—that Mr. Archibald Deacon’s alibi did not exist in fact.)

“Superintendent Boyd and I at once agreed that to suspect the alibiless Poole (the butler) was folly. He had been, obviously and by common report, devoted to his master. Moreover, he is physically incapable—even were he out of his mind—of dealing such blows as caused the death of the murdered man.

“After our conversation, Superintendent Boyd and I together made an examination of the study, the room in which the murder was done. Together we came to the following conclusions,[¹] all of which were explained by the superintendent in his evidence at the inquest. Since, therefore, these points are by this common knowledge, I will not go into the processes by which they were arrived at, but will merely enumerate them as follows:—