How it came there—whether it rolled from the table, or was swept off inadvertently by the detective’s hand, and how it came to be caught by this old tassel and held there in spite of the many shakings it must have received, did not concern me at this momentous instant. The talisman of this old family was found. I had but to discover what it held concealed to understand what had baffled Mr. Moore and made the mystery he had endeavored to penetrate so insolvable. Rejoicing in my triumph, but not wasting a moment in self-congratulation, I bent over the candle with my prize and sought for the clasp or fastening which held its two parts together. I have a knack at clasps and curious fastenings and was able at first touch to spring this one open. And what did I find inside? Something so different from what I expected, something so trivial and seemingly harmless, that it was not until I recalled the final words of Uncle David’s memorandum that I realized its full import and the possibilities it suggested. In itself it was nothing but a minute magnifying glass; but when used in connection with—what? Ah, that was just what Uncle David failed to say, possibly to know. Yet this was now the important point, the culminating fact which might lead to a full understanding of these many tragedies. Could I hope to guess what presented itself to Mr. Moore as a difficult if not insolvable problem? No; guessing would not answer. I must trust to the inspiration of the moment which suggested with almost irresistible conviction:
_The picture! That inane and seemingly worthless drawing over the fireplace in The Colonel’s Own, whose presence in so rich a room has always been a mystery!_
Why this object should have suggested itself to me and with such instant conviction, I can not readily say. Whether, from my position near the bed, the sight of this old drawing recalled the restless nights of all who had lain in face of its sickly smile, or whether some recollection of that secret law of the Moores which forbade the removal of any of their pictures from the time-worn walls, or a remembrance of the curiosity which this picture excited in every one who looked at it—Francis Jeffrey among the number—I no sooner asked myself what object in this house might possibly yield counsel or suggest aid when subjected to the influence of a magnifying glass, than the answer, which I have already given, sprang instantly into my mind: The picture!