六座拿破仑半身像（28）

“If he was his confederate why should he carry his photograph?” I asked.

“As a means of tracing him if he wished to inquire about him from any third person. That was the obvious reason. Well, after the murder I calculated that Beppo would probably hurry rather than delay his movements. He would fear that the police would read his secret, and so he hastened on before they should get ahead of him. Of course, I could not say that he had not found the pearl in Harker's bust. I had not even concluded for certain that it was the pearl; but it was evident to me that he was looking for something, since he carried the bust past the other houses in order to break it in the garden which had a lamp overlooking it. Since Harker's bust was one in three the chances were exactly as I told you, two to one against the pearl being inside it. There remained two busts, and it was obvious that he would go for the London one first. I warned the inmates of the house, so as to avoid a second tragedy, and we went down with the happiest results. By that time, of course, I knew for certain that it was the Borgia pearl that we were after. The name of the murdered man linked the one event with the other. There only remained a single bust—the Reading one—and the pearl must be there. I bought it in your presence from the owner—and there it lies.”

We sat in silence for a moment.

“Well,” said Lestrade, “I've seen you handle a good many cases, Mr. Holmes, but I don't know that I ever knew a more workmanlike one than that. We're not jealous of you at Scotland Yard. No, sir, we are very proud of you, and if you come down to-morrow there's not a man, from the oldest inspector to the youngest constable, who wouldn't be glad to shake you by the hand.”