"That was why we ran. But I think our retreat had all the appearance of a rout, as I intended that it should. Pardon my playing upon your very natural fears, old man, but you could not have simulated panic half so naturally! And if they had suspected that the device was discovered, we might never have quitted The Gables alive. It was touch-and-go for a moment."
"But—"
"Turn out the light!" snapped my companion.
Wondering greatly, I did as he desired. I turned out the light ... and in the darkness of my study I saw a fiery fist being shaken at me threateningly!... The bones were distinctly visible, and the luminosity of the flesh was truly ghastly.
"Turn on the light again!" cried Smith.
Deeply mystified, I did so ... and my friend tossed a little electric pocket-lamp on to the writing table.
"They used merely a small electric lamp fitted into the handle of a glass dagger," he said with a sort of contempt. "It was very effective, but the luminous hand is a phenomenon producible by anyone who possesses an electric torch."
"The Gables will be watched?"
"At last, Petrie, I think we have Fu-Manchu—in his own trap!"