"He told me he had run across Gustav Jerbette's unpublished memoirs in the course of his researches. And Jerbette, in describing how he came to paint 'Elaine Duchard's Escape,' says the figure in the time mirror on which you concentrated--the man with the horse pistol--was the first Elaine Duchard's lover, Jacques Rombeau. "Jerbette says Rombeau came to him with a strange assignment. First he took him to the largest glass works in Paris and made him wait while the craftsmen manufactured a special mirror to his order. Then Rombeau led the way to an abandoned chateau a few miles out of Paris. Elaine Duchard lay hidden on the top floor, desperately ill. "Jerbette's job was to paint a picture of the girl and a strange man, as described to him by Rombeau. Both wore clothes of a different type than any then known, and were in strange surroundings. The job done, Rombeau dismissed the painter. Later, Jerbette says he heard that the two lovers were surprised and murdered by Baron Morriere and his men, although the baron himself was killed in the fight. "All this so intrigued Jerbette that he promptly painted his famous 'Elaine Duchard's Escape,' showing the lovers getting away from the baron's chateau." Mark frowned. Shook his head. "I see how you think it ties in, Professor," he admitted, "but there are too many loopholes." The savant smiled. "Yes, there are loopholes," he agreed, "but I do not think there are too many. "The strange portrait Jerbette painted unfortunately never turned up again. It, of course, would be final proof. For if we found a picture of you--Mark Carter--and Elaine, in a twentieth century scene and wearing modern clothes, yet painted by Gustav Jerbette, there could be no doubt that your brain--cloaked in Jacques Rombeau's body--did the job. "However, Jerbette does leave a very accurate description of the mirror Rombeau had made. And there is no doubt in my mind that it is the same one Vance gave to Elaine." "But it's impossible!" Mark protested. "I couldn't have made a time mirror with the primitive equipment of that era--" "I believe you could. Our work in discovering the formula for the one I made gave you a sufficient understanding of the device's fundamentals to construct a crude model." "But a terrific bolt of electricity was required, professor. And there was no electrical equipment in those days. It's a complete anachronism." * * * * * "You think so?" The old scientist smiled. "Well, I do not wonder. You convinced Jerbette that Jacques Rombeau was stark, raving mad." "You mean--" "What other conclusion could any sane mortal draw from the actions of a man who insisted on defying God and the elements by exposing great circular trays of molten glass on top of the highest tower in all Paris during the worst electrical storm in years, until finally one of them was struck by lightning?"