Northwood finished reading and turned thoughtfully to the window. His profile in repose had the straight-nosed, full-lipped perfection of a Greek coin. Old, wizened Professor Michael, gazing at him covertly, smothered a sigh. "I wish you knew Dr. Mundson," he said. "He, the ugliest man in the world, delights in physical perfection. He would revel in your splendid body and brilliant mind." Northwood blushed hotly. "You'll have to arrange a meeting between us." "I have." The professor's thin, dry lips pursed comically. "He'll drop in to see you within a few days." And now John Northwood sat holding Dr. Mundson's card and the wallet which the scientist had so mysteriously dropped at his feet. * * * * * Here was high adventure, perhaps, for which he had been singled out by the famous electrical wizard. While excitement mounted in his blood, Northwood again examined the photograph. The girl's strange eyes, odd in expression rather than in size or shape, seemed to hold him. The young man's breath came quicker. "It's a challenge," he said softly. "It won't hurt to see what it's all about." His watch showed eleven o'clock. He would return the wallet that night. Into his coat pocket he slipped a revolver. One sometimes needed weapons in Indian Court. He took a taxi, which soon turned from the well-lighted streets into a section where squalid houses crowded against each other, and dirty children swarmed in the streets in their last games of the day. Indian Court was little more than an alley, dark and evil smelling. The chauffeur stopped at the entrance and said: "If I drive in, I'll have to back out, sir. Number forty-four and a half is the end house, facing the entrance." "You've been here before?" asked Northwood. "Last week I drove the queerest bird here--a fellow as good-looking as you, who had me follow the taxi occupied by a hunchback with a face like Old Nick." The man hesitated and went on haltingly: "It might sound goofy, mister, but there was something funny about my fare. He jumped out, asked me the charge, and, in the moment I glanced at my taxi-meter, he disappeared. Yes, sir. Vanished, owing me four dollars, six bits. It was almost ghostlike, mister." Northwood laughed nervously and dismissed him. He found his number and knocked at the dilapidated door. He heard a sudden movement in the lighted room beyond, and the door opened quickly. Dr. Mundson faced him. "I knew you'd come!" he said with a slight Teutonic accent. "Often I'm not wrong in sizing up my man. Come in." Northwood cleared his throat awkwardly. "You dropped your wallet at my feet, Dr. Mundson. I tried to stop you before you got away, but I guess you did not hear me." He offered the wallet, but the hunchback waved it aside.