Chapter IX

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This, in my opinion, as in those of the several specialists consulted, was due, not to the blow on the head, but to the presence, slightly below and to the right of the first cervical curve of the spine, of a minute puncture--undoubtedly caused by a hypodermic syringe. Then, unconsciously, poor Denby furnished the last link in the chain; for undoubtedly, by means of this operation, Fu-Manchu had designed to efface from Eltham's mind his plans of return to Ho-Nan.

The nature of the fluid which could produce such mental symptoms was a mystery--a mystery which defied Western science: one of the many strange secrets of Dr. Fu-Manchu.