"For the purpose of arriving, as far as possible, at a clear comprehension of this part of the mystery let us for a moment follow the probable movements of Mr. Death on that night. "He is dismissed from his employment, and he leaves the office, a disappointed and unhappy man; he relates to his wife all that passed between him and his employer, and subsequently informs her that he is going to Catchpole Square to make another appeal to his employer. I gather that the time of his arrival at the house would be about ten o'clock, at which hour we may assume that Mr. Samuel Boyd had not retired to rest. At about nine o'clock Lady Wharton left Mr. Samuel Boyd at the door of his house, and from that moment all is mystery. We know, however, that he must have had matters to attend to which would keep him up a couple of hours. Lady Wharton had deposited with him a number of valuable jewels, to which, when she was gone, he would naturally devote attention, appraising them, and probably taking a list of them. The dismissal of his clerk would most likely cause him to pay some attention to the state of the books and accounts, and the jewels had to be put in a place of safety. "All this would occupy him a couple of hours, and this brings us to eleven o'clock, when he would be ready to seek his bed. But before this hour Mr. Abel Death, according to the theory we are following out, has paid his visit, or rather, has made his attempt to see his employer. He knocks at the door, and in response to the summons Mr. Boyd goes down to see who is there. A man living alone in a house so safely removed from public observation would be scarcely likely to open his street door to casual visitors at ten o'clock at night, nor, the business of the day being over, would he neglect to put the chain on the street door. His probable course of action would be to go down, and, opening the door as far as the chain would allow, inquire who is there. He is answered by Mr. Death, who begs to be admitted to make his appeal; is refused; while standing in the square implores to be taken back; is listened to, laughed at, ordered to go away, and the door shut in his face.