"Now the house in Queen Square is virtually a museum. The upper part is separated from the lower by a massive door which opens from the hall and gives access to the staircase, and which is fitted with a Chubb night-latch. There are two latchkeys, of which John used to keep one and I the other. You will find them both in the safe behind me. The caretaker had no key and no access to the upper part of the house unless admitted by one of us.

"At the time when I came in, after Doctor Norbury had left, the caretaker was in the cellar, where I could hear him breaking coke for the hot-water furnace. I had left John on the third floor opening some of the packing cases by the light of a lamp with a tool somewhat like a plasterer's hammer; that is, a hammer with a small axe-blade at the reverse of the head. As I stood talking to Doctor Norbury, I could hear him knocking out the nails and wrenching up the lids; and when I entered the doorway leading to the stairs, I could still hear him. Just as I closed the staircase door behind me, I heard a rumbling noise from above; then all was still.

"I went up the stairs to the second floor, where, as the staircase was all in darkness, I stopped to light the gas. As I turned to ascend the next flight, I saw a hand projecting over the edge of the half-way landing. I ran up the stairs, and there, on the landing, I saw John lying huddled up in a heap at the foot of the top flight. There was a wound at the side of his forehead from which a little blood was trickling. The case-opener lay on the floor close by him and there was blood on the axe-blade. When I looked up the stairs I saw a rag of torn matting hanging over the top stair.

"It was quite easy to see what had happened. He had walked quickly out on the landing with the case-opener in his hand. His foot had caught in the torn matting and he had pitched head foremost down the stairs, still holding the case-opener. He had fallen so that his head had come down on the upturned edge of the axe-blade; he had then rolled over and the case-opener had dropped from his hand.

"I lit a wax match and stooped down to look at him. His head was in a very peculiar position, which made me suspect that his neck was broken. There was extremely little bleeding from the wound; he was perfectly motionless; I could detect no sign of breathing; and I felt no doubt that he was dead.

"It was an exceedingly regrettable affair, and it placed me, as I perceived at once, in an extremely awkward position. My first impulse was to send the caretaker for a doctor and a policeman; but a moment's reflection convinced me that there were serious objections to this course.

"There was nothing to show that I had not, myself, knocked him down with the case-opener. Of course, there was nothing to show that I had; but we were alone in the house with the exception of the caretaker, who was down in the basement out of ear-shot.

"There would be an inquest. At the inquest, inquiries would be made as to the will which was known to exist. But, as soon as the will was produced, Hurst would become suspicious. He would probably make a statement to the coroner and I should be charged with the murder. Or, even if I were not charged, Hurst would suspect me and would probably repudiate the assignment; and, under the circumstances, it would be practically impossible for me to enforce it. He would refuse to pay and I could not take my claim into Court.

"I sat down on the stairs just above poor John's body and considered the matter in detail. At the worst, I stood a fair chance of hanging; at the best, I stood to lose close upon fifty thousand pounds. These were not pleasant alternatives.

"Supposing, on the other hand, I concealed the body and gave out that John had gone to Paris. There was, of course, the risk of discovery, in which case I should certainly be convicted of the murder. But if no discovery occurred, I was not only safe from suspicion, but I secured the fifty thousand pounds. In either case there was considerable risk, but in one there was the certainty of loss, whereas in the other there was a material advantage to justify the risk. The question was whether it would be possible to conceal the body. If it were, then the contingent profit was worth the slight additional risk. But a human body is a very difficult thing to dispose of, especially to a person of so little scientific culture as myself.