"Did it? I am sorry. But really you should not adopt a thief's stealthy methods if you are so sensitive. When I invite a gentleman into my private room, I do not expect to have him fingering my clothing whilst my back is turned."

"Take care, Mr. Mitchel, you are speaking to a detective. If I did stretch my hand towards your clothing it was with no wrong intent and you know it."

"Certainly I do, and what is more I know just what you were wishing to do. You must not get angered so easily. I should not have used the words which I did, but to tell you the truth I was piqued."

"I don't understand."

"It hurt my feelings to have you treat me just like an ordinary criminal. That you should think I would let you come in here and make whatever examinations you have in your mind, right before my very eyes, wounded my pride. I never should have turned my back upon you except that I faced a mirror. I told you I know what you wished to do. It was to examine the buttons on my vest, was it not?"

Mr. Barnes was staggered but did not show it. Calmly he said:

"As you know, I overheard your conversation on the train. You spoke of having a set of five curious buttons and——"

"Pardon me, I said six, not five." Once more Mr. Barnes had failed to trap the man. He suggested five, hoping that Mr. Mitchel might claim that to have been the original number, thus eliminating the lost one.

"Of course, you did say six, now I remember," he continued, "and I think you will admit it was not unnatural curiosity which led me to wish to see them, that—that—well that I might recognize them again."

"A very laudable intent. But my dear Mr. Barnes, I have told you that you may call upon me at any time, and ask me any questions you please. Why did you not frankly ask me to show you the buttons?"