John Thorndyke's Cases<br />related by Christopher Jervis and edited by R. Austin Freeman, R. Austin Freeman [best pdf ebook reader txt] 📗

"I will ask you to hand that knife to the coroner," said Thorndyke, when Petrofsky had been secured and handcuffed, and the superintendent had readjusted his collar. "Will you kindly examine it, sir," he continued, "and tell me if there is a notch in the edge, near to the point—a triangular notch about an eighth of an inch long?"

The coroner looked at the knife, and then said in a tone of surprise: "Yes, there is. You have seen this knife before, then?"

"No, I have not," replied Thorndyke. "But perhaps I had better continue my statement. There is no need for me to tell you that the fingerprints on the card and on the candle are those of Paul Petrofsky; I will proceed to the evidence furnished by the body.

"In accordance with your order, I went to the mortuary and examined the corpse of the deceased. The wound has been fully and accurately described by Dr. Davidson, but I observed one fact which I presume he had overlooked. Embedded in the bone of the spine—in the left transverse process of the fourth vertebra—I discovered a small particle of steel, which I carefully extracted."

He drew his collecting-box from his pocket, and taking from it a seed-envelope, handed the latter to the coroner. "That fragment of steel is in this envelope," he said, "and it is possible that it may correspond to the notch in the knife-blade."

Amidst an intense silence the coroner opened the little envelope, and let the fragment of steel drop on to a sheet of paper. Laying the knife on the paper, he gently pushed the fragment towards the notch. Then he looked up at Thorndyke.

"It fits exactly," said he.

There was a heavy thud at the other end of the room and we all looked round.

Petrofsky had fallen on to the floor insensible.

"An instructive case, Jervis," remarked Thorndyke, as we walked homewards—"a case that reiterates the lesson that the authorities still refuse to learn."

"What is that?" I asked.

"It is this. When it is discovered that a murder has been committed, the scene of that murder should instantly become as the Palace of the Sleeping Beauty. Not a grain of dust should be moved, not a soul should be allowed to approach it, until the scientific observer has seen everything in situ and absolutely undisturbed. No tramplings of excited constables, no rummaging by detectives, no scrambling to and fro of bloodhounds. Consider what would have happened in this case if we had arrived a few hours later. The corpse would have been in the mortuary, the hair in the sergeant's pocket, the bed rummaged and the sand scattered abroad, the candle probably removed, and the stairs covered with fresh tracks.

"There would not have been the vestige of a clue."

"And," I added, "the deep sea would have uttered its message in vain."