"Madam," said Burr in a gentle, disarmingly quiet voice, "your manner of entrance might have cost you your life. Luckily I was able to deflect the rays from your person, else you might not now be able to voice your complaint--for such seems to be your purpose in coming here." He turned to Jared, who was standing close by. "Very well, Jared. You may go. After this, it will be as well to throw the bolts, though in this case I am quite willing to see the visitor." Jared slid away, leaving the plump little woman to confront the famous scientist. For a moment, Mrs. Baker stared into the pale gray eyes, the pupils of which seemed black as coal by contrast. Some, his bitter enemies, claimed that Professor Ramsey Burr looked cold and bleak as an iceberg, others that he had a baleful glare. His mouth was grim and determined. * * * * * Yet, with her woman's eyes, Mrs. Baker, looking at the professor's bony mask of a face, with the high-bridged, intrepid nose, the passionless gray eyes, thought that Ramsey Burr would be handsome, if a little less cadaverous and more human. "The experiment which you ruined by your untimely entrance," continued the professor, "was not a safe one." His long white hand waved toward the bunched apparatus, but to her to the room seemed all glittering metal coils of snakelike wire, ruddy copper, dull lead, and tubes of all shapes. Hell cauldrons of unknown chemicals seethed and slowly bubbled, beetle-black bakelite fixtures reflected the hideous light. "Oh," she cried, clasping her hands as though she addressed him in prayer, "forget your science, Professor Burr, and be a man. Help me. Three days from now my boy, my son, whom I love above all the world, is to die." "Three days is a long time," said Professor Burr calmly. "Do not lose hope: I have no intention of allowing your son, Allen Baker, to pay the price for a deed of mine. I freely confess it was I who was responsible for the death of--what was the person's name?--Smith, I believe." "It was you who made Allen get poor Mr. Smith to agree to the experiments which killed him, and which the world blamed on my son," she said. "They called it the deed of a scientific fiend, Professor Burr, and perhaps they are right. But Allen is innocent."