in a whisper; and then, with one accord, we all looked towards the other end of the room, and so remained for a time without speaking.
There was, in the entire aspect of the room, something very grim and dreadful. An atmosphere of tragic mystery enveloped the most commonplace objects; and sinister suggestions lurked in the most familiar appearances. Especially impressive was the air of suspense—of ordinary, every-day life suddenly arrested—cut short in the twinkling of an eye. The electric lamps, still burning dim and red, though the summer sunshine streamed in through the windows; the half-emptied tumbler and open book by the empty chair, had each its whispered message of swift and sudden disaster, as had the hushed voices and stealthy movements of the waiting men, and, above all, an awesome shape that was but a few hours since a living man, and that now sprawled, prone and motionless, on the floor.
"This is a mysterious affair," observed Inspector Badger, breaking the silence at length, "though it is clear enough up to a certain point. The body tells its own story."
We stepped across and looked down at the corpse. It was that of a somewhat elderly man, and lay, on an open space of floor before the fireplace, face downwards, with the arms extended. The slender hilt of a dagger projected from the back below the left shoulder, and, with the exception of a trace of blood upon the lips, this was the only indication of the mode of death. A little way from the body a clock-key lay on the carpet, and, glancing up at the clock on the mantelpiece, I perceived that the glass front was open.
"You see," pursued the inspector, noting my glance, "he was standing in front of the fireplace, winding the clock. Then the murderer stole up behind him—the noise of the turning key must have covered his movements—and stabbed him. And you see, from the position of the dagger on the left side of the back, that the murderer must have been left-handed. That is all clear enough. What is not clear is how he got in, and how he got out again."
"The body has not been moved, I suppose," said Thorndyke.
"No. We sent for Dr. Egerton, the police-surgeon, and he certified that the man was dead. He will be back presently to see you and arrange about the post-mortem."
"Then," said Thorndyke, "we will not disturb the body till he comes, except to take the temperature and dust the dagger-hilt."
He took from his bag a long, registering chemical thermometer and an insufflator or powder-blower. The former he introduced under the dead man's clothing against the abdomen, and with the latter blew a stream of fine yellow powder on to the black leather handle of the dagger. Inspector Badger stooped eagerly to examine the handle, as Thorndyke blew away the powder that had settled evenly on the surface.
"No finger-prints," said he, in a disappointed tone. "He must have worn gloves. But that inscription gives a pretty broad hint."
He pointed, as he spoke, to the metal guard of the dagger, on which was engraved, in clumsy lettering, the single word, "TRADITORE."
"That's the Italian for 'traitor,'" continued the inspector, "and I got some information from the porter that fits in with that suggestion. We'll have him in presently, and you shall hear."
"Meanwhile," said Thorndyke, "as the position of the body may be of importance in the inquiry, I will take one or two photographs and make a rough plan to scale. Nothing has been moved, you say? Who opened the windows?"
"They were open when we came in," said Mr. Marchmont. "Last night was very hot, you remember. Nothing whatever has been moved."
Thorndyke produced from his bag a small folding camera, a telescopic tripod, a surveyor's measuring-tape, a boxwood scale, and a sketch-block. He set up the camera in a corner, and exposed a plate, taking a general view of the room, and including the corpse. Then he moved to the door and made a second exposure.
"Will you stand in front of the clock, Jervis," he said, "and raise your hand as if winding it? Thanks; keep like that while I expose a plate."
I remained thus, in the position that the dead man was assumed to have occupied at the moment of the murder, while the plate was exposed, and then, before I moved, Thorndyke marked the position of my feet with a blackboard chalk. He next set up the tripod over the chalk marks, and took two photographs from that position, and finally photographed the body itself.
The photographic operations being concluded, he next proceeded, with remarkable skill and rapidity, to lay out on the sketch-block a ground-plan of the room, showing the exact position of the various objects, on a scale of a quarter of an inch to the foot—a process that the inspector was inclined to view with some impatience.
"You don't spare trouble, Doctor," he remarked; "nor time either," he added, with a significant glance at his watch.
"No," answered Thorndyke, as he detached the finished sketch from the block; "I try to collect all the facts that may bear on a case. They may prove worthless, or they may turn out of vital importance; one never knows beforehand, so I collect them all. But here, I think, is Dr. Egerton."
The police-surgeon greeted Thorndyke with respectful cordiality, and we proceeded at once to the examination of the body. Drawing out the thermometer, my colleague noted the reading, and passed the instrument to Dr. Egerton.
"Dead about ten hours," remarked the latter, after a glance at it. "This was a very determined and mysterious murder."
"Very," said Thorndyke. "Feel that dagger, Jervis."
I touched the hilt, and felt the characteristic grating of bone.
"It is through the edge of a rib!" I exclaimed.
"Yes; it must have been used with extraordinary force. And you notice that the clothing is screwed up slightly, as if the blade had been rotated as it was driven in. That is a very peculiar feature, especially when taken together with the violence of the blow."
"It is singular, certainly," said Dr. Egerton, "though I don't know that it helps us much. Shall we withdraw the dagger before moving the body?"
"Certainly," replied Thorndyke, "or the movement may produce fresh injuries. But wait." He took a piece of string from his pocket, and, having drawn the dagger out a couple of inches, stretched the string in a line parallel to the flat of the blade. Then, giving me the ends to hold, he drew the weapon out completely. As the blade emerged, the twist in the clothing disappeared. "Observe," said he, "that the string gives the direction of the wound, and that the cut in the clothing no longer coincides with it. There is quite a considerable angle, which is the measure of the rotation of the blade."
"Yes, it is odd," said Dr. Egerton, "though, as I said, I doubt that it helps us."
"At present," Thorndyke rejoined dryly, "we are noting the facts."
"Quite so," agreed the other, reddening slightly; "and perhaps we had better move the body to the bedroom, and make a preliminary inspection of the wound."
We carried the corpse into the bedroom, and, having examined the wound without eliciting anything new, covered the remains with a sheet, and returned to the sitting-room.
"Well, gentlemen," said the inspector, "you have examined the body and the wound, and you have measured the floor and the furniture, and taken photographs, and made a plan, but we don't seem much more forward. Here's a man murdered in his rooms. There is only one entrance to the flat, and that was bolted on the inside at the time of the murder. The windows are some forty feet from the ground; there is no rain-pipe near any of them; they are set flush in the wall, and there isn't a foothold for a fly on any part of that wall. The grates are modern,
