"Then what the devil do you mean?" I cried angrily. "You have arrested her, haven't you?"

"She has been arrested," he answered quietly.

"What for?"

"You seem very anxious on her account."

"Would you have a man indifferent when his sister is whisked off to gaol by the police devils of yours?"

"Indifferent? No, indeed; certainly not. Even I am not indifferent about it. It has been of the utmost use to me, in fact."

"How long are you going to keep up these riddles, Prince? I don't pretend to be your equal at that kind of fence, and as it's perfectly evident to me you think you have a knotted whip for my back I'll wait till you're ready to lay it on."

He laughed at that.

"Are you going to accept my conditions?" he asked.

"It will depend absolutely on the result of this interview."