"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."
"Be quiet," ordered Burr, raising his hand. "Remember, madam, your son Allen is only a commonplace medical man, and while I taught him a little from my vast store of knowledge, he was ignorant and of much less value to science and humanity than myself. Do you not understand, can you not comprehend, also, that the man Smith was a martyr to science? He was no loss to mankind, and only sentimentalists could have blamed anyone for his death. I should have succeeded in the interchange of atoms which we were working on, and Smith would at this moment be hailed as the first man to travel through space in invisible form, projected on radio waves, had it not been for the fact that the alloy which conducts the three types of sinusoidal failed me and burned out. Yes, it was an error in calculation, and Smith would now be called the Lindbergh of the Atom but for that. Yet Smith has not died in vain, for I have finally corrected this error—science is but trial and correction of error—and all will be well."
"But Allen—Allen must not die at all!" she cried. "For weeks he has been in the death house: it is killing me. The Governor refuses him a pardon, nor will he commute my son's sentence. In three days he is to die in the electric chair, for a crime which you admit you alone are responsible for. Yet you remain in your laboratory, immersed in your experiments, and do nothing, nothing!"
The tears came now, and she sobbed hysterically. It seemed that she was making an appeal to someone in whom she had only a forlorn hope.
"Nothing?" repeated Burr, pursing his thin lips. "Nothing? Madam, I have done everything. I have, as I have told you, perfected the experiment. It is successful. Your son has not suffered in vain, and Smith's name will go down with the rest of science's martyrs as one who died for the sake of humanity. But if you wish to save your son, you must be calm. You must listen to what I have to say, and you must not fail to carry out my instructions to the letter. I am ready now."
Light, the light of hope, sprang in the mother's eyes. She grasped his arm and stared at him with shining face, through tear-dipped eyelashes.
"Do—do you mean it? Can you save him? After the Governor has refused me? What can you do? No influence will snatch Allen from the jaws of the law: the public is greatly excited and very hostile toward him."
A quiet smile played at the corners of Burr's thin lips.
"Come," he said. "Place this cloak about you. Allen wore it when he assisted me."