"Robbery, I should say," was his reply. "But, strangely enough, there is no suggestion of theft in this report; neither does there seem to be any woman in the case."

"You, of course, suspect that my friend Digby and the man Cane, are one and the same person!" I said. "But is it feasible that if Cane were really responsible for the death of the real Sir Digby, would he have the bold audacity to return to London and actually pose as his victim?"

"Yes, Mr. Royle," replied the detective, "I think it most feasible. Great criminals have the most remarkable audacity. Some really astounding cases of most impudent impersonation have come under my own observation during my career in this office."

"Then you adhere to the theory which you formed at first?"

"Most decidedly," he replied; "and while it seems that you have a surprise to spring upon me very shortly, so have I one to spring upon you—one which I fear, Mr. Royle," he added very slowly, looking me gravely in the face—"I fear may come as a great shock to you."

I sat staring at him, unable to utter a syllable.

He was alluding to Phrida, and to the damning evidence against her.

What could he know? Ah! who had betrayed my love?

CHAPTER XXIII.