But this promised difficulties. He could not remember just what persons he had entertained on that especial day in his little hall of cabinets, and, when he did succeed in getting a list of them from his butler, he was by no means sure that it included the full number of his guests. His own memory was execrable, and, in short, he had but few facts to offer to the discreet agent sent up from Scotland Yard one morning to hear his complaint and act secretly in his interests. He could give him carte blanche to carry on his inquiries in the diamond market, but little else. And while this seemed to satisfy the agent, it did not lead to any gratifying result to himself, and he had thoroughly made up his mind to swallow his loss and say nothing about it, when one day a young cousin of his, living in great style in an adjoining county, informed him that in some mysterious way he had lost from his collection of arms a unique and highly-prized stiletto of Italian workmanship. Startled by this coincidence, Mr. Grey ventured upon a question or two, which led to his cousin’s confiding to him the fact that this article had disappeared after a large supper given by him to a number of friends and gentlemen from London. This piece of knowledge, still further coinciding with his own experience, caused Mr. Grey to ask for a list of his guests, in the hope of finding among them one who had been in his own house. His cousin, quite unsuspicious of the motives underlying this request, hastened to write out this list, and together they pored over the names, crossing out such as were absolutely above suspicion. When they had reached the end of the list, but two names remained uncrossed. One was that of a rattle-pated youth who had come in the wake of a highly reputed connection of theirs, and the other that of an American tourist who gave all the evidences of great wealth and had presented letters to leading men in London which had insured him attentions not usually accorded to foreigners. This man’s name was Fairbrother, and, the moment Mr. Grey heard it, he recalled the fact that an American with a peculiar name, but with a reputation for wealth, had been among his guests on the suspected evening. Hiding the effect produced upon him by this discovery, he placed his finger on this name and begged his cousin to look up its owner’s antecedents and present reputation in America; but, not content with this, he sent his own agent over to New York—whither, as he soon learned, this gentleman had returned. The result was an apparent vindication of the suspected American. He was found to be a well-known citizen of the great metropolis, moving in the highest circles and with a reputation for wealth won by an extraordinary business instinct.