“That, knowing his duty so well, Mr. Alan Warburton will do it, undoubtedly.” And she bowed with ironical courtesy.

“And you still persist in your refusal to explain?”

“On the contrary, I am quite at your service.”

She smiled as she said these words. At least she could humble the pride of this superior being, and she would have this small morsel of revenge. Her answer astonished him. His surprise was manifest. And she favored him with a frosty smile as she asked:

“What is it that my brother-in-law desires to know?”

“The truth,” he replied sternly. “What took you to that vile den on the night of your masquerade? Are those Francoises the people you have so frequently visited by stealth? Are they your clandestine correspondents?”

“Your questions come too fast,” she retorted calmly. “I will reverse the order of my answers. The Francoises are my clandestine correspondents. My visits by stealth, have all been paid to them. It was a threat that took me there that eventful night.”

“A threat?”

“Yes.”

“Then you are in their power?”