"I shouldn't wonder. It is a matter I should not have spoken about to any one. I see it now."

They turned up China alley at last, entering the long building into which Alice had been taken on the night of her capture.

Harry now traveled over the same ground.

They ascended one flight, entered that elevator, and Ah Lung let them down to the long corridor under ground.

Harry wondered at the many doors.

"What new organization am I up against?" he asked himself.

But of Ah Lung he asked no questions, feeling that he was in the man's hands for better or for worse.

"Now I don't know whether anything is going to come out of this or not," Lung said with his fingers. "I am expecting to meet a certain party on business. I shall bring the conversation around to the princess. The man is supposed to be my friend. If he has betrayed me I want to know it. At all events, it is my only chance of giving you a clew on which to start your search."

"Right," said Harry. "Lead on."

Lung stopped before a door, on which he knocked three times.