"I have known her for more years than she or I would care to remember," he answered. "For a woman who has led the life she has, she wears uncommonly well. A beautiful creature! The very finest shoulders in all Paris, and that is saying something."

He blew a kiss off the tips of his fingers, and raised his glass in her honour.

"I drink to her in this noble wine, but I do not let her touch my money. Oh no, la belle Louise is a clever woman, a very clever woman, but money trickles through her fingers like water through a sieve. Let me think for a moment. She ruined the Marquis D'Esmai, the Vicomte Cotforét, Monsieur D'Armier, and many others whose names I cannot now recall. The first is with our noble troops in Cochin China, the second is in Algeria, and the third I know not where, and now I have learnt since my arrival in Paris that she has got hold of a young Englishman, who is vastly wealthy. She will have all he has got very soon, and then he will begin the world anew. You are interested in that Englishman, of course?"

"How do you know that?"

"Because you question me about Mademoiselle Beaumarais," he answered. "A good many people have asked me about her at different times, but it is always the man they want to get hold of. You, my astute Fairfax, are interested in the man, not because you want to save him from her, but because he has done a little something which he should not have done elsewhere. The money he is lavishing on Mademoiselle Louise, whence does it come? Should I be very wrong if I suggested gems?"

I gave a start of surprise. How on earth did he guess this?

"Yes! I see I'm right," he answered with a little laugh. "Well, I knew it a long time ago. Ah, you are astonished! You should surely never allow yourself to be surprised by anything. Now I will tell you how I come to know about the gems. Some time ago a certain well-known lady of this city lost her jewel-case in a mysterious manner. The affair was placed in my hands, and when I had exhausted Paris, I went to Amsterdam, en route if necessary for London. You know our old friends, Levenstein and Schartzer?"

I nodded. I had had dealings with that firm on many occasions.

"Well, as I went into their office, I saw the gentleman who has been paying his attentions to the lady we have been discussing, come out. I have an excellent memory for faces, and when I saw him to-night entering the Café des Ambassadeurs, I recognized him immediately. Thus the mystery is explained."

He shrugged his shoulders and spread his hands apart, like a conjurer who has just vanished a rabbit or an orange.