"But the most startling peculiarity of the will was the way in which it fitted the circumstances of the disappearance. It looked as if clause two had been drawn up with those very circumstances in view. Since, however, the will was ten years old, this was impossible. But if clause two could not have been devised to fit the disappearance, could the disappearance not have been devised to fit clause two? That was by no means impossible: under the circumstances it looked rather probable. And if it had been so contrived, who was the agent in that contrivance? Hurst stood to benefit, but there was no evidence that he even knew the contents of the will. There only remained Mr. Jellicoe, who had certainly connived at the misdrawing of the will for some purpose of his own—some dishonest purpose.

"The evidence of the will, then, pointed to Mr. Jellicoe as the agent in the disappearance, and, after reading it, I definitely suspected him of the crime.

"Suspicion, however, is one thing and proof is another; I had not nearly enough evidence to justify me in laying an information, and I could not approach the Museum officials without making a definite accusation. The great difficulty of the case was that I could discover no motive. I could not see any way in which Mr. Jellicoe would benefit by the disappearance. His own legacy was secure, whenever and however the testator died. The murder and concealment apparently benefited Hurst alone; and, in the absence of any plausible motive, the facts required to be much more conclusive than they were."

"Did you form absolutely no opinion as to motive?" asked Mr. Jellicoe.

He put the question in a quiet, passionless tone, as if he were discussing some cause célèbre in which he had nothing more than a professional interest. Indeed, the calm, impersonal interest that he displayed in Thorndyke's analysis, his unmoved attention, punctuated by little nods of approval at each telling point in the argument, were the most surprising features of this astounding interview.

"I did form an opinion," replied Thorndyke, "but it was merely speculative, and I was never able to confirm it. I discovered that about ten years ago Mr. Hurst had been in difficulties and that he had suddenly raised a considerable sum of money, no one knew how or on what security. I observed that this even coincided with the execution of the will, and I surmised that there might be some connection between them. But that was only a surmise; and, as the proverb has it, 'He discovers who proves.' I could prove nothing, so that I never discovered Mr. Jellicoe's motive, and I don't know it now."

"Don't you really?" said Mr. Jellicoe, in something approaching a tone of animation. He laid down the end of his cigarette, and, as he selected another from the silver case, he continued: "I think that is the most interesting feature of your really remarkable analysis. It does you great credit. The absence of motive would have appeared to most persons a fatal objection to the theory, of what I may call, the prosecution. Permit me to congratulate you on the consistency and tenacity with which you have pursued the actual, visible facts."

He bowed stiffly to Thorndyke (who returned his bow with equal stiffness), lighted a fresh cigarette, and once more leaned back in his chair with the calm, attentive manner of a man who is listening to a lecture or a musical performance.

"The evidence, then, being insufficient to act upon," Thorndyke resumed, "there was nothing for it but to wait for some new facts. Now, the study of a large series of carefully conducted murders brings into view an almost invariable phenomenon. The cautious murderer, in his anxiety to make himself secure, does too much; and it is this excess of precaution that leads to detection. It happens constantly; indeed, I may say that it always happens—in those murders that are detected; of those that are not we say nothing—and I had strong hopes that it would happen in this case. And it did.

"At the very moment when my client's case seemed almost hopeless, some human remains were discovered at Sidcup. I read the account of the discovery in the evening paper, and scanty as the report was, it recorded enough facts to convince me that the inevitable mistake had been made."