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 mystery through which we were groping, and I found my attention wander so continually from the fiction to the fact, that I at last flung it across the room, and gave myself up entirely to a consideration of the events of the day. Supposing that this unhappy young man’s story was absolutely true, then what hellish thing, what absolutely unforeseen and extraordinary calamity could have occurred between the time when he parted from his father, and the moment when, drawn back by his screams, he rushed into the glade? It was something terrible and deadly. What could it be? Might not the nature of the injuries reveal something to my medical instincts? I rang the bell, and called for the weekly county paper, which contained a verbatim account of the inquest. In the surgeon’s deposition it was stated that the posterior third of the left parietal bone and the left half of the occipital bone had been shattered by a heavy blow from a blunt weapon. I marked the spot upon my own head. Clearly such a blow must have been struck from behind. That was to some extent in favour of the accused, as when seen quarrelling he was face to face with his father. Still, it did not go for very much, for the older man might have turned his back before the blow fell. Still, it might be worth while to call Holmes’ attention to it. Then there was the peculiar dying reference to a rat. What could that mean? It could not be delirium. A man dying from a sudden blow does not commonly become delirious. No, it was more likely to be an attempt to explain how he met his fate. But what could it indicate? I cudgelled my brains to find some possible explanation. And then the incident of the grey cloth, seen by young McCarthy. If that were true, the murderer must have dropped some part of his dress, presumably his overcoat, in his flight, and must have had the hardihood to return and to carry it away at the instant when the son was kneeling with his back turned not a dozen paces off. What a tissue of mysteries and improbabilities the whole thing was! I did not wonder at Lestrade’s opinion, and yet I had so much faith in Sherlock Holmes’ insight that I could not lose hope as long as every fresh fact seemed to strengthen his conviction of young McCarthy’s innocence.

It was late before Sherlock Holmes returned. He came back alone, for Lestrade was staying in lodgings in the town.

"The glass still keeps very high," he remarked, as he sat down. "It is of importance that it should not rain before we are able to go over the ground. On the other hand, a man should be at his very best and keenest for such nice work as that, and I did not wish to do it when fagged by a long journey. I have seen young McCarthy."

"And what did you learn from him?"

"Nothing."

"Could he throw no light?"

"None at all. I was inclined to think at one time that he knew who had done it, and was screening him or her, but I am convinced now that he is as puzzled as everyone else. He is not a very quick-witted youth, though comely to look at, and, I should think, sound at heart."

"I cannot admire his taste," I remarked, "if it is indeed a fact that he was averse to a marriage with so charming a young lady as this Miss Turner."

"Ah, thereby hangs a rather painful tale. This fellow is madly, insanely in love with her, but some two years ago, when he was