“Bluff, Watson, bluff! When I considered the passionate, unconventional, unbusinesslike tone of his letter and contrasted it with his self-contained manner and appearance, it was pretty clear that there was some deep emotion which centred upon the accused woman rather than upon the victim. We’ve got to understand the exact relations of those three people if we are to reach the truth. You saw the frontal attack which I made upon him, and how imperturbably he received it. Then I bluffed him by giving him the impression that I was absolutely certain, when in reality I was only extremely suspicious.”

“Perhaps he will come back?”

“He is sure to come back. He must come back. He can’t leave it where it is. Ha! isn’t that a ring? Yes, there is his footstep. Well, Mr. Gibson, I was just saying to Dr. Watson that you were somewhat overdue.”