Into my eyes, widely opened in wonder, looked the dark eyes of the captive; and beneath the disguise I picked out the charming features of the slave girl. There were tears on the whitened lashes, and she was submissive now.

"This time," said my friend hardly, "we have fairly captured her—and we will hold her."

From somewhere up-stream came a faint call.

"The dacoit!"

Nayland Smith's lean body straightened; he stood alert, strung up.

Another call answered, and a third responded. Then followed the flatly shrill note of a police whistle, and I noted a column of black vapor rising beyond the wall, mounting straight to heaven as the smoke of a welcome offering.

The surrounded mansion was in flames!

"Curse it!" rapped Smith. "So this time we were right. But, of course, he has had ample opportunity to remove his effects. I knew that. The man's daring is incredible. He has given himself till the very last moment—and we blundered upon two of the outposts."

"I lost one."

"No matter. We have the other. I expect no further arrests, and the house will have been so well fired by the Doctor's servants that nothing can save it. I fear its ashes will afford us no clew, Petrie; but we have secured a lever which should serve to disturb Fu-Manchu's world."