Hamer sprang to his feet with a snarl, slammed the door, locked it, and turned on Dorrington. But now Dorrington had a revolver in his hand, though his manner was as genial as ever. [Illustration: "DORRINGTON HAD A REVOLVER IN HIS HAND."] "Yes, yes," he said; "best to shut the door, of course. People listen, don't they? But sit down again. I'm not anxious to hurt you, and, as you will perceive, you're quite unable to hurt me. What I chiefly came to say is this: last evening my client, M. Léon Bouvier, of this office and the Café des Bons Camarades, was attacked in the passage adjoining his house by a man who was waiting for him, with a woman--was it really Mrs. Hamer? but there, I won't ask--keeping watch. He was robbed of a small old wooden box, containing charcoal and--a diamond. My name is Dorrington--firm of Dorrington & Hicks, which you may have heard of. That's my card. I've come to take away that diamond." Hamer was pale and angry, but, in his way, was almost as calm as Dorrington. He put down the card without looking at it. "I don't understand you," he said. "How do you know I've got it?" "Come, come, Mr. Hamer," Dorrington replied, rubbing the barrel of his revolver on his knee, "that's hardly worthy of you. You're a man of business, with a head on your shoulders--the sort of man I like doing business with, in fact. Men like ourselves needn't trifle. I've shown you most of the cards I hold, though not all, I assure you. I'll tell you, if you like, all about your little tour round among the druggists with the convenient toothache, all about the evenings on which you watched Bouvier home, and so on. But, really, need we, as men of the world, descend to such peddling detail?" "Well, suppose I have got it, and suppose I refuse to give it you. What then?" "What then? But why should we talk of unpleasant things? You won't refuse, you know." "Do you mean you'd get it out of me by help of that pistol?" "Well," said Dorrington, deliberately, "the pistol is noisy, and it makes a mess, and all that, but it's a useful thing, and I _might_ do it with that, you know, in certain circumstances. But I wasn't thinking of it--there's a much less troublesome way." "Which?" "You're a slower man than I took you for, Mr. Hamer--or perhaps you haven't quite appreciated _me_ yet. If I were to go to that window and call the police, what with the little bits of evidence in my pocket, and the other little bits that the druggists who sold the chloroform would give, and the other bits in reserve, that I prefer not to talk about just now--there would be rather an awkwardly complete case of robbery with violence, wouldn't there? And you'd have to lose the diamond after all, to say nothing of a little rest in gaol and general ruination."