He had gleaned along the same furrows as I had. There was Murdoch’s character and the mystery which seemed to hang round the man. His furious bursts of temper, as shown in the incident of the dog. The fact that he had quarrelled with McPherson in the past, and that there was some reason to think that he might have resented his attentions to Miss Bellamy. He had all my points, but no fresh ones, save that Murdoch seemed to be making every preparation for departure.
“What would my position be if I let him slip away with all this evidence against him?” The burly, phlegmatic man was sorely troubled in his mind.
“Consider,” I said, “all the essential gaps in your case. On the morning of the crime he can surely prove an alibi. He had been with his scholars till the last moment, and within a few minutes of McPherson’s appearance he came upon us from behind. Then bear in mind the absolute impossibility that he could singlehanded have inflicted this outrage upon a man quite as strong as himself. Finally, there is this question of the instrument with which these injuries were inflicted.”
“What could it be but a scourge or flexible whip of some sort?”
“Have you examined the marks?” I asked.
“I have seen them. So has the doctor.”
“But I have examined them very carefully with a lens. They have peculiarities.”
“What are they, Mr. Holmes?”
I stepped to my bureau and brought out an enlarged
