"By the way," said Brett, "did the driver of the hansom which conveyed Mr. Talbot and his companion from Albert Gate on Monday night tell you which road he followed?"

"Yes," said the detective, "he went this way."

Brett rubbed his hands, with a queer expression of thoughtful pleasure on his keen face.

"Ah," he said, "I like that. It is well to be on the scent."

He did not explain to his professional confrère that it was a positive stimulant to his abounding energy and highly-strung nerves to find that he was actually following the path taken by the criminal whom he was pursuing. The mere fact lent reality to the chase. For a mile, at any rate, there could be no mistake, though he might expect a check at the Carlton. Arrived there, Brett alighted.

"Are you going to make any inquiries in the hotel, sir?" said Mr. Winter.

"Why should I?" said Brett. "You have already ascertained from the management that no person even remotely resembling any of the parties concerned is staying at the hotel."

"Yes, confound it, I know I did," cried the other, "but I never told you so."

"That is all right," laughed Brett. "Come and see me at my chambers this evening when the inquest is finished. Perhaps by that time we may be able to determine our plan of action."

Once left to himself, Brett did not enter the hotel. Indeed, he hardly glanced at that palatial structure, having evidently dismissed it from his mind as being in no way connected with the tragedy he was investigating. He made it an invariable rule in conducting inquiries of this nature to adopt the French method of "reconstituting" the incidents of a crime, so far as such a course was possible in the absence of the persons concerned. He reasoned that a very plausible explanation of the unexpected appearance of the three strangers in the Albert Gate mansion on Monday night had been given to Jack Talbot. This young gentleman, it might be taken for granted, had not been selected by the Foreign Office to carry to a successful issue such an important and delicate matter as that entrusted to him, without some good grounds for the faith in his qualities exhibited by his superiors. Brett thought he could understand the brother's character and attributes from his favourable analysis of the sister, and it was quite reasonable, therefore, to believe that Talbot was a man not likely to be easily duped. The principals in this crime were evidently well aware of the trust reposed in the Assistant Under-Secretary, and they, again, would not underrate his intelligence. Hence there was a good cause for Talbot to accept the explanations, whatever they were, given him during the conclave in the dining-room; the effect of which, in Inspector Sharpe's words, had been to "puzzle" the young Englishman. Further, there must have been a very potent inducement held out before Talbot would consent to drive off with a stranger at such a late hour, and when the cab was dismissed at the Carlton, the excuse given would certainly be quite feasible.