I am removing our things. Meet me at Mary's. Your devoted,Margot.'
'This is very important,' Charles said. 'This does give us a clue. We know two things now: his real name is Paul—whatever else it may be, and Madame Picardet's is Margot.'
I searched the pocket again, and pulled out a ring. Evidently he had thrust these two things there when he saw me pursuing him, and had forgotten or neglected them in the heat of the mêlée.
I looked at it close. It was the very ring I had noticed on his finger while he was playing Swedish poker. It had a large compound gem in the centre, set with many facets, and rising like a pyramid to a point in the middle. There were eight faces in all, some of them composed of emerald, amethyst, or turquoise. But one face—the one that turned at a direct angle towards the wearer's eye—was not a gem at all, but an extremely tiny convex mirror. In a moment I spotted the trick. He held this hand carelessly on the table while my brother-in-law dealt; and when he saw that the suit and number of his own card mirrored in it by means of the squeezers were better than Charles's, he had 'an inspiration,' and backed his luck—or rather his knowledge—with perfect confidence. I did not doubt, either, that his odd-looking eyeglass was a powerful magnifier which helped him in the trick. Still, we tried another deal, by way of experiment—
