"Thus my attention was directed toward the woman who had a motive, but was reported to have lacked the opportunity. I called at once upon Mrs. Beaumont.
"This lady is of quite a different mould from her cousin. Older by at least ten years, she is still handsome, her beauty being, however, physical in character only. She lacks the self-poise and dignity which renders Mrs. Merivale's beauty so much more attractive. Moreover, she is voluble, where the other is reserved, a trait which I welcomed as affording me more opportunity to gain some possible clue to truth.
"She came into her reception-room where I awaited her, evidently brimful of curiosity. I had sent in my card, and it seems she had heard of me in connection with that somewhat famous wager of yours.
"'Mr. Barnes, the detective, I believe,' she said as she entered.
"'At your service, Madame,' I replied. 'May I have a few minutes' conversation with you upon a trifling, yet quite puzzling matter?'
"'Why, certainly,' said she, 'but don't keep me in suspense. I am burning with curiosity to know why a detective should call on me.'
"I thought that this woman might be caught by a sudden attack, and made the venture.
"'A diamond stud was stolen from Mrs. Upton this morning, while you were there!' I said, watching her closely. She did not flinch, but seemed honestly not to comprehend the suggestiveness of my words.
"'I do not understand you,' said she.
"'It is not a serious matter, Madame, but Mrs. Upton placed a diamond stud on her tea-table while you and Mrs. Merivale were with her, and missed it a moment after you had left. Therefore——'