As a matter of fact, burglars who have done a good stroke of business are, as a rule, only too glad to enjoy the proceeds in peace and quiet without embarking on another perilous undertaking. Again, it is unusual for burglars to operate at so early an hour, it is unusual for burglars to strike a lady to prevent her screaming, since one would imagine that was the sure way to make her scream, it is unusual for them to commit murder when their numbers are sufficient to overpower one man, it is unusual for them to be content with a limited plunder when there was much more within their reach, and finally, I should say, that it was very unusual for such men to leave a bottle half empty. How do all these unusuals strike you, Watson?”
“Their cumulative effect is certainly considerable, and yet each of them is quite possible in itself. The most unusual thing of all, as it seems to me, is that the lady should be tied to the chair.”
“Well, I am not so clear about that, Watson, for it is evident that they must either kill her or else secure her in such a way that she could not give immediate notice of their escape. But at any rate I have shown, have I not, that there is a certain element of improbability about the lady’s story? And now, on the top of this, comes the incident of the wineglasses.”
“What about the wineglasses?”
“Can you see them in your mind’s eye?”
“I see them clearly.”
“We are told that three men drank from them. Does that strike you as likely?”
“Why not? There was wine in each glass.”
“Exactly, but there was beeswing only in one glass. You must have noticed that fact. What does that suggest to your mind?”