“That is the end of my adventure. What I have to tell you now is what I learned from the police.
“At the station-house to which the man guided me I related what you have just heard. I told them that the house they must at once find was one set back from the street within a radius of two hundred yards from the Knightsbridge Barracks, that within fifty yards of it some one was giving a dance to the music of a Hungarian band, and that the railings before it were as high as a man’s waist and filed to a point. With that to work upon, twenty men were at once ordered out into the fog to search for the house, and Inspector Lyle himself was despatched to the home of Lord Edam, Chetney’s father, with a warrant for Lord Arthur’s arrest. I was thanked and dismissed on my own recognizance.
“This morning, Inspector Lyle called on me, and from him I learned the police theory of the scene I have just described.
“Apparently I had wandered very far in the fog, for up to noon to-day the house had not been found, nor had they been able to arrest Lord Arthur. He did not return to his father’s house last night, and there is no trace of him; but from what the police knew of the past lives of the people I found in that lost house, they have evolved a theory, and their theory is that the murders were committed by Lord Arthur.
“The infatuation of his elder brother, Lord Chetney, for a Russian princess, so Inspector Lyle tells me, is well known to every one. About two years ago the Princess Zichy, as she calls herself, and he were constantly together, and Chetney informed his friends that they were about to be married. The woman was notorious in two continents, and when Lord Edam heard of his son’s infatuation he appealed to the police for her record.
“It is through his having applied to them that they know so much concerning her and her relations with the Chetneys. From the police Lord Edam learned that Madame Zichy had once been a spy in the employ of the Russian Third Section, but that lately she had been repudiated by her own government and was living by her wits, by blackmail, and by her beauty. Lord Edam laid this record before his son, but Chetney either knew it already or the woman persuaded him not to believe in it, and the father and son parted in great anger. Two days later the marquis altered his will, leaving all of his money to the younger brother, Arthur.
“The title and some of the landed property he could not keep from Chetney, but he swore if his son saw the woman again that the will should stand as it was, and he would be left without a penny.
“This was about eighteen months ago, when apparently Chetney tired of the Princess, and suddenly went off to shoot and explore in Central Africa. No word came from him, except that twice he was reported as having died of fever in the jungle, and finally two traders reached the coast who said they had seen his body. This was accepted by all as conclusive, and young Arthur was recognized as the heir to the Edam millions. On the strength of this supposition he at once began to borrow enormous sums from the money lenders. This is of great importance, as the police believe it was these debts which drove him to the murder of his brother. Yesterday, as you know, Lord Chetney suddenly returned from the grave, and it was the fact that for two years he had been considered as dead which lent such importance to his return and which gave rise to those columns of detail concerning him which appeared in all the afternoon papers. But, obviously, during his absence he had not tired of the Princess Zichy, for we know that a few hours after he reached London he sought her out. His brother, who had also learned of his reappearance through the papers, probably suspected which would be the house he would first visit, and followed him there, arriving, so the Russian servant tells us, while the two were at coffee in the drawing-room. The Princess, then, we also learn from the servant, withdrew to the dining-room, leaving the brothers together. What happened one can only guess.
“Lord Arthur knew now that when it was discovered he was no longer the heir, the money-lenders would come down upon him. The police believe that he at once sought out his brother to beg for money to cover the post-obits, but that, considering the sum he needed was several hundreds of thousands of pounds, Chetney refused to give it him. No one knew that Arthur had gone to seek out his brother. They were alone. It is possible, then, that in a passion of disappointment, and crazed with the disgrace which he saw before him, young Arthur made himself the heir beyond further question. The death of his brother would have availed nothing if the woman remained alive. It is then possible that he crossed the hall, and with the same weapon which made him Lord Edam’s heir destroyed the solitary witness to the murder. The only other person who could have seen it was sleeping in a drunken stupor, to which fact undoubtedly he owed his life. And yet,” concluded the Naval Attache, leaning forward and marking each word with his finger, “Lord Arthur blundered fatally. In his haste he left the door of the house open, so giving access to the first passer-by, and he forgot that when he entered it he had handed his card to the servant. That piece of paper may yet send him to the gallows. In the mean time he has disappeared completely, and somewhere, in one of the millions of streets of this great capital, in a locked and empty house, lies the body of his brother, and of the woman his brother loved, undiscovered, unburied, and with their murder unavenged.”
In the discussion which followed the conclusion of the story of the Naval Attache the gentleman with the pearl took no part. Instead, he arose, and, beckoning a servant to a far corner of the room, whispered earnestly to him until a sudden movement on the part of Sir Andrew caused him to return hurriedly to the table.