"Where is Fu-Manchu?"
Nayland Smith, from just within the door, threw out the query in a tone of stark amaze. I stood up—I could do nothing more for the poor victim at the moment—and looked about me.
The room was innocent of furniture, save for heaps of rubbish on the floor, and a tin oil-lamp hung on the wall. The dead Chinaman lay close beside Smith. There was no second door, the one window was barred and from this room we had heard the voice, the unmistakable, unforgettable voice, of Fu-Manchu.
But Dr. Fu-Manchu was not there!
Neither of us could accept the fact for a moment; we stood there, looking from the dead man to the tortured man who had only swooned, in a state of helpless incredulity.
Then the explanation flashed upon us both, simultaneously, and with a cry of baffled rage Smith leapt along the passage to the second door. It was wide open. I stood at his elbow when he swept its emptiness with the ray of his pocket-lamp.
There was a speaking-tube fixed between the two rooms!
Smith literally ground his teeth.
"Yet, Petrie," he said, "we have learnt something. Fu-Manchu had evidently promised Eltham his life if he would divulge the name of his correspondent. He meant to keep his word; it is a sidelight on his character."