"But, listen here," said Dr. Bird persuasively, "why don't you come with us? You know the object of our coming here. We aim to destroy this plant and let the earth take its normal tilt. You hate Saranoff, although I don't know why. If you'll help us to destroy him, we'll guarantee you a welcome in the United States and you can join your brother. I'll take him back into my laboratory."

"My brother is dead," she said bitterly. "After he left you, he fell into more evil times. His wife died and he swore revenge upon the society which had murdered her. An opportunity came to him to join Saranoff, and he did so. Saranoff hated him and distrusted him, although he was the soul of loyalty. As a reward for his genius and aid to Saranoff in constructing the black lamp, Saranoff abandoned him to you. It was your men who killed him when you blew into nothingness the helicopter he was piloting in your state of Maryland, near Washington."

"All the more reason why you should revenge yourself upon Saranoff," replied the doctor. "We will give you a chance to do so and aid you. We also give you an opportunity to be received in a free country with honor."

An expression of rage distorted the girl's features.

"I am a woman of the proletariat!" she cried. "I hate Ivan Saranoff for what he has done but I am loyal to him. He alone will force the bourgeoisie to their knees and establish the rule of the people. I hate your country and your government; yes, and I hate you. I aid you because I must pay my just debts. Come, the way is clear for your escape. Don't ask how I cleared it."

"Come on," said Dr. Bird with a shrug of his shoulders. "There is no arguing with convictions. She must act according to her lights, even as we must act according to ours. Grab your guns and let's go."

The three buckled on the weapons and belts of ammunition and followed the girl from the cell. Once outside she touched her lips for silence. A door barred their way but she opened it with a key which she withdrew from her dress. Outside the door, a guard slumbered noisily. At a motion from the girl, Carnes rolled him over on his face to quiet his snoring. He moved and stirred, but did not wake.

A few feet from the door the girl paused and faced the wall. She manipulated a hidden lever and a panel swung open in the wall. She led the way silently into the dark. As the panel closed behind her, a beam of light from an electric torch stabbed the darkness. Down a sloping tunnel they followed her for half a mile. The tunnel turned at right angles and led upward. At length they paused before another door. The girl opened it and they stepped out into the night. As they did so, a dull booming struck their ears. The girl paused.

"The ship!" she cried. "Your ship! It is attacking Fort Novadwinskaja. The factory will be awake in a moment! Run for your lives!"

Even as she spoke a pair of twinkling lights appeared far down the tunnel through which they had come. She turned as if to return down the tunnel. Dr. Bird caught her about the waist and clapped his hand over her mouth.