""We are trying to build a house of blocks," he exclaimed, "with half of the blocks missing. We have been considering two theories," he went on: "one that Lord Arthur is responsible for both murders, and the other that the dead woman in there is responsible for one of them, and has committed suicide; but, until the Russian servant is ready to talk, I shall refuse to believe in the guilt of either."
""What can you prove by him?" I asked. "He was drunk and asleep. He saw nothing."
"Lyle hesitated, and then, as though he had made up his mind to be quite frank with me, spoke freely.
""I do not know that he was either drunk or asleep," he answered.
"Lieutenant Sears describes him as a stupid boor. I am not satisfied that he is not a clever actor. What was his position in this house? What was his real duty here? Suppose it was not to guard this woman, but to watch her. Let us imagine that it was not the woman he served, but a master, and see where that leads us. For this house has a master, a mysterious, absentee landlord, who lives in St. Petersburg, the unknown Russian who came between Chetney and Zichy, and because of whom Chetney left her. He is the man who bought this house for Madame Zichy, who sent these rugs and curtains from St. Petersburg to furnish it for her after his own tastes, and, I believe, it was he also who placed the Russian servant here, ostensibly to serve the Princess, but in reality to spy upon her. At Scotland Yard we do not know who this gentleman is; the Russian police confess to equal ignorance concerning him. When Lord Chetney went to Africa, Madame Zichy lived in St. Petersburg; but there her receptions and dinners were so crowded with members of the n.o.bility and of the army and diplomats, that, among so many visitors, the police could not learn which was the one for whom she most greatly cared."
"Lyle pointed at the modern French paintings and the heavy, silk rugs which hung upon the walls.
""The unknown is a man of taste and of some fortune," he said, "not the sort of man to send a stupid peasant to guard the woman he loves. So I am not content to believe, with Mr. Sears, that the servant is a boor.
I believe him, instead, to be a very clever ruffian. I believe him to be the protector of his master"s honor, or, let us say, of his master"s property, whether that property be silver plate or the woman his master loves. Last night, after Lord Arthur had gone away, the servant was left alone in this house with Lord Chetney and Madame Zichy. From where he sat in the hall, he could hear Lord Chetney bidding her farewell; for, if my idea of him is correct, he understands English quite as well as you or I. Let us imagine that he heard her entreating Chetney not to leave her, reminding him of his former wish to marry her, and let us suppose that he hears Chetney denounce her, and tell her that at Cairo he has learned of this Russian admirer--the servant"s master. He hears the woman declare that she has had no admirer but himself, that this unknown Russian was, and is, nothing to her, that there is no man she loves but him, and that she cannot live, knowing that he is alive, without his love. Suppose Chetney believed her, suppose his former infatuation for her returned, and that, in a moment of weakness, he forgave her and took her in his arms. That is the moment the Russian master has feared. It is to guard against it that he has placed his watch-dog over the Princess, and how do we know but that, when the moment came, the watch-dog served his master, as he saw his duty, and killed them both? What do you think?" Lyle demanded. "Would not that explain both murders?"
"I was only too willing to hear any theory which pointed to anyone else as the criminal than Arthur, but Lyle"s explanation was too utterly fantastic. I told him that he certainly showed imagination, but that he could not hang a man for what he imagined he had done.
""No," Lyle answered, "but I can frighten him by telling him what I think he has done, and now when I again question the Russian servant I will make it quite clear to him that I believe he is the murderer.
I think that will open his mouth. A man will at least talk to defend himself. Come," he said, "we must return at once to Scotland Yard and see him. There is nothing more to do here."
"He arose, and I followed him into the hall, and in another minute we would have been on our way to Scotland Yard. But just as he opened the street-door a postman halted at the gate of the garden, and began fumbling with the latch.
"Lyle stopped, with an exclamation of chagrin.
""How stupid of me!" he exclaimed. He turned quickly and pointed to a narrow slit cut in the bra.s.s plate of the front door. "The house has a private letter-box," he said, "and I had not thought to look in it! If we had gone out as we came in, by the window, I would never have seen it. The moment I entered the house I should have thought of securing the letters which came this morning. I have been grossly careless."
He stepped back into the hall and pulled at the lid of the letter-box, which hung on the inside of the door, but it was tightly locked. At the same moment the postman came up the steps holding a letter. Without a word, Lyle took it from his hand and began to examine it. It was addressed to the Princess Zichy, and on the back of the envelope was the name of a West End dressmaker.
""That is of no use to me," Lyle said. He took out his card and showed it to the postman. "I am Inspector Lyle from Scotland Yard," he said.
"The people in this house are under arrest. Everything it contains is now in my keeping. Did you deliver any other letters here this morning?"
"The man looked frightened, but answered, promptly, that he was now upon his third round. He had made one postal delivery at seven that morning and another at eleven.
""How many letters did you leave here?" Lyle asked.
""About six altogether," the man answered.
""Did you put them through the door into the letter-box?"
"The postman said, "Yes, I always slip them into the box, and ring and go away. The servants collect them from the inside."
""Have you noticed if any of the letters you leave here bear a Russian postage-stamp?" Lyle asked.
""The man answered, "Oh, yes, sir, a great many."
""From the same person, would you say?"
""The writing seems to be the same," the man answered. "They come regularly about once a week--one of those I delivered this morning had a Russian postmark."
""That will do," said Lyle, eagerly. "Thank you, thank you very much."
"He ran back into the hall, and, pulling out his penknife, began to pick at the lock of the letter-box.
""I have been supremely careless," he said, in great excitement. "Twice before when people I wanted had flown from a house I have been able to follow them by putting a guard over their mailbox. These letters, which arrive regularly every week from Russia in the same handwriting, they can come but from one person. At least, we shall now know the name of the master of this house. Undoubtedly, it is one of his letters that the man placed here this morning. We may make a most important discovery."
"As he was talking he was picking at the lock with his knife, but he was so impatient to reach the letters that he pressed too heavily on the blade and it broke in his hand. I took a step backward and drove my heel into the lock, and burst it open. The lid flew back, and we pressed forward, and each ran his hand down into the letter-box. For a moment we were both too startled to move. The box was empty.
"I do not know how long we stood, staring stupidly at each other, but it was Lyle who was the first to recover. He seized me by the arm and pointed excitedly into the empty box.
""Do you appreciate what that means?" he cried. "It means that someone has been here ahead of us. Someone has entered this house not three hours before we came, since eleven o"clock this morning."
""It was the Russian servant!" I exclaimed.
""The Russian servant has been under arrest at Scotland Yard," Lyle cried. "He could not have taken the letters. Lord Arthur has been in his cot at the hospital. That is his alibi. There is someone else, someone we do not suspect, and that someone is the murderer. He came back here either to obtain those letters because he knew they would convict him, or to remove something he had left here at the time of the murder, something incriminating--the weapon, perhaps, or some personal article; a cigarette-case, a handkerchief with his name upon it, or a pair of gloves. Whatever it was, it must have been d.a.m.ning evidence against him to have made him take so desperate a chance."
""How do we know," I whispered, "that he is not hidden here now?"
""No, I"ll swear he is not," Lyle answered. "I may have bungled in some things, but I have searched this house thoroughly. Nevertheless," he added, "we must go over it again, from the cellar to the roof. We have the real clew now, and we must forget the others and work only it." As he spoke he began again to search the drawing-room, turning over even the books on the tables and the music on the piano.
""Whoever the man is," he said, over his shoulder, "we know that he has a key to the front door and a key to the letter-box. That shows us he is either an inmate of the house or that he comes here when he wishes. The Russian says that he was the only servant in the house. Certainly, we have found no evidence to show that any other servant slept here. There could be but one other person who would possess a key to the house and the letter-box--and he lives in St. Petersburg. At the time of the murder he was two thousand miles away." Lyle interrupted himself, suddenly, with a sharp cry, and turned upon me, with his eyes flashing.
"But was he?" he cried. "Was he? How do we know that last night he was not in London, in this very house when Zichy and Chetney met?"
"He stood, staring at me without seeing me, muttering, and arguing with himself.
""Don"t speak to me," he cried, as I ventured to interrupt him. "I can see it now. It is all plain. It was not the servant, but his master, the Russian himself, and it was he who came back for the letters! He came back for them because he knew they would convict him. We must find them. We must have those letters. If we find the one with the Russian postmark, we shall have found the murderer." He spoke like a madman, and as he spoke he ran around the room, with one hand held out in front of him as you have seen a mind-reader at a theatre seeking for something hidden in the stalls. He pulled the old letters from the writing-desk, and ran them over as swiftly as a gambler deals out cards; he dropped on his knees before the fireplace and dragged out the dead coals with his bare fingers, and then, with a low, worried cry, like a hound on a scent, he ran back to the waste-paper basket and, lifting the papers from it, shook them out upon the floor. Instantly, he gave a shout of triumph, and, separating a number of torn pieces from the others, held them up before me.
""Look!" he cried. "Do you see? Here are five letters, torn across in two places. The Russian did not stop to read them, for, as you see, he has left them still sealed. I have been wrong. He did not return for the letters. He could not have known their value. He must have returned for some other reason, and, as he was leaving, saw the letter-box, and, taking out the letters, held them together--so--and tore them twice across, and then, as the fire had gone out, tossed them into this basket. Look!" he cried, "here in the upper corner of this piece is a Russian stamp. This is his own letter--unopened!"
"We examined the Russian stamp and found it had been cancelled in St.
Petersburg four days ago. The back of the envelope bore the postmark of the branch-station in upper Sloane Street, and was dated this morning.
The envelope was of official, blue paper, and we had no difficulty in finding the other two parts of it. We drew the torn pieces of the letter from them and joined them together, side by side. There were but two lines of writing, and this was the message: "I leave Petersburg on the night-train, and I shall see you at Trevor Terrace, after dinner, Monday evening."
""That was last night!" Lyle cried. "He arrived twelve hours ahead of his letter--but it came in time--it came in time to hang him!""
The Baronet struck the table with his hand.
"The name!" he demanded. "How was it signed? What was the man"s name?"
The young Solicitor rose to his feet and, leaning forward, stretched out his arm. "There was no name," he cried. "The letter was signed with only two initials. But engraved at the top of the sheet was the man"s address. That address was "THE AMERICAN EMBa.s.sY, ST. PETERSBURG, BUREAU OF THE NAVAL ATTACHE," and the initials," he shouted, his voice rising into an exultant and bitter cry, "were those of the gentleman who sits opposite who told us that he was the first to find the murdered bodies, the Naval Attache to Russia, Lieutenant Sears!"
A strained and awful hush followed the Solicitor"s words, which seemed to vibrate like a tw.a.n.ging bowstring that had just hurled its bolt. Sir Andrew, pale and staring, drew away, with an exclamation of repulsion.
His eyes were fastened upon the Naval Attache with fascinated horror.
But the American emitted a sigh of great content, and sank, comfortably, into the arms of his chair. He clapped his hands, softly, together.
"Capital!" he murmured. "I give you my word I never guessed what you were driving at. You fooled ME, I"ll be hanged if you didn"t--you certainly fooled me."
The man with the pearl stud leaned forward, with a nervous gesture.
"Hush! be careful!" he whispered. But at that instant, for the third time, a servant, hastening through the room, handed him a piece of paper which he scanned eagerly. The message on the paper read, "The light over the Commons is out. The House has risen."
The man with the black pearl gave a mighty shout, and tossed the paper from him upon the table.
"Hurrah!" he cried. "The House is up! We"ve won!" He caught up his gla.s.s, and slapped the Naval Attache, violently, upon the shoulder. He nodded joyously at him, at the Solicitor, and at the Queen"s Messenger.