Slowly, spiritlessly, Mark forced himself to concentrate on the happenings of the evening. His voice a dull monotone, he again recounted his story. "This woman," probed Professor Duchard, his bright blue eyes stabbing into the other's brown orbs. "Tell me about her. What did she look like?" Mark shrugged. "She was only a reflection in a mirror, professor. It was Elaine. Probably the lighting gave me the illusion of someone else." "Cease thinking of her as a reflection!" the savant retorted, his voice suddenly sharp. "You are a newspaperman by trade. You have been trained to observe closely. I want you to use those powers now. Think of this woman as a person. Describe her to to me as if she were one--" "She looked like Elaine," said Mark, racking his brain for details. "She looked just like her. Only different, the way two identical twins are different. You know what I mean, professor? The way a person's individual personality sticks out of him in spite of his appearance--" "Yes. I quite understand." "Well, that was the way it was with this woman. She was Elaine, but she wasn't. There was something about her that didn't belong to Elaine." His brows knitted. "It seemed as if I'd seen her before, somewhere. Just like I'd known her, but couldn't remember just when or where." A pause. "It was her clothing that made us notice her, though. She wore a red satin dress with more white ruffles than I ever saw before. She had a red hat, too, with a big plume. Her hair was done in a different style than I've ever seen. All fixed up. And she wore gloves that reached to above her elbow." He searched his weary mind for more details. Gave it up in despair, "I don't know, professor. I can't remember any more. She was just like a picture of one of the women attending a Louis XVI ball in France--" * * * * * A sudden light sprang into his brown eyes. He stopped short in mid-sentence. "That's it!" he cried. "I've got it! I know where I saw her before!" Professor Duchard leaned forward, blue eyes flashing. "Where?" he demanded. "Hurry, man! Out with it!" "You've got a picture of her!" Mark exclaimed excitedly. "Right here, in this study!" He half-rose from the leather chair. Peered into the corner behind him. "It's gone!" The professor's face was suddenly pale. "That picture called 'Elaine Duchard's Escape'? The Jerbette? Is that the one you mean?" "That's it. That's the one. Where is it?" "It is gone," the savant answered grimly. "A genuine painting by Gustav Jerbette is worth a great deal of money. And I am not a wealthy man. When Adrian Vance offered to buy it--" "Adrian Vance! That snake! He's the one who gave Elaine the mirror--" The white-haired scientist was on his feet, his eyes suddenly very bright and cold. The veins stood out at his temples. "I want to see that mirror!" he rapped. "This is the first time you have mentioned that it was he who sent it. Come on!"