"He may have instructed his Cairo agents," he added significantly.

"God grant she get to England in safety," I whispered. "Smith! can we make no move to round up the devils who defy us, here in the very heart of civilized England? Listen. You will not have forgotten the wild-cat Eurasian Zarmi?"

Smith nodded. "I recall the lady perfectly!" he snapped.

"Unless my imagination has been playing me tricks, I have seen her twice within the last few days—once in the neighborhood of this hotel and once in a cab in Piccadilly."

"You mentioned the matter at the time," said Smith shortly; "but although I made inquiries, as you remember, nothing came of them."

"Nevertheless, I don't think I was mistaken. I feel in my very bones that the Yellow hand of Fu-Manchu is about to stretch out again. If only we could apprehend Zarmi."

Nayland Smith lighted his pipe with care.

"If only we could, Petrie!" he said; "but, damn it!"—he dashed his left fist into the palm of his right hand—"we are doomed to remain inactive. We can only await the arrival of Kâramaneh and see if she has anything to tell us. I must admit that there are certain theories of my own which I haven't yet had an opportunity of testing. Perhaps in the near future such an opportunity may arise."

How soon that opportunity was to arise neither of us suspected then; but Fate is a merry trickster, and even as we spoke of these matters events were brewing which were to lead us along strange paths.

With such glad anticipations as my pen cannot describe, their gladness not unmixed with fear, I retired to rest that night, scarcely expecting to sleep, so eager was I for the morrow. The musical voice of Kâramaneh seemed to ring in my ears; I seemed to feel the touch of her soft hands and to detect, as I drifted into the borderland betwixt reality and slumber, that faint, exquisite perfume which from the first moment of my meeting with the beautiful Eastern girl, had become to me inseparable from her personality.