He told about the contents of the camera cases being turned to a gritty, sooty powder. Then he added: "Dillon set them to destroy themselves. You understand. He's not a man. He's a creature from some planet other than Earth, passing for a human being. He's an Invader from space." Hallen's expression was uneasy and compassionate but utterly unbelieving. Helena shivered and turned away her face. Coburn's lips went taut. He reached down to his desk. He made a sudden, abrupt gesture. Hallen caught his breath and started up. * * * * * Coburn said curtly: "Another one of them. Helena, is that foam-suit comfortable?" The girl jerked her face around. She looked frightened. "Helena," said Coburn, "the real Helena, that is, would not sit down on a dusty chair. No woman would. But you did. She is a very truthful girl. You lied to me. And I just stuck pins in your shoulder and you didn't notice. They're sticking in your foam suit now. You and the creature that passed for Dillon up-country are both aliens. Invaders. Do you want to try to convince me otherwise?" The girl said evenly: "Mr. Coburn, I do not think you are well--" Then Coburn said thickly: "I'm crazy enough to put a bullet through you if your gang of devils has harmed the real Helena. What's happened to her?" Hallen moved irresolutely to interfere. But the girl's expression changed. She smiled. "The real Helena, Mr. Coburn," said an entirely new voice, "has gone to the suburbs to visit her fiance's family. She is quite safe." There was dead silence. The figure--it even moved like Helena--got composedly to its feet. It got its coat. It put the coat on. Hallen stared with his mouth open. The pins hadn't convinced him, but the utterly different voice coming from this girl's mouth had. Yet, waves of conflicting disbelief and conviction, horror and a racking doubt, chased themselves over his features. "She admits she's not Helena!" said Coburn with loathing. "It's not human! Should I shoot it?" The girl smiled at him again. Her eyes were very bright. "You will not, Mr. Coburn. And you will not even try to keep me prisoner to prove your story. If I screamed that you attack me--" the smile widened--"Helena's good Greek friends would come to my assistance." She walked confidently to the door and opened it. Then she said warmly: "You are very intelligent, Mr. Coburn. We approve of you very much. But nobody will believe you." The office door closed. Coburn turned stiffly to the man he'd called to hear him. "Should I have shot her, Hallen?" Hallen sat down as if his knees had given way beneath him. After a long time he got out a handkerchief and painfully mopped his face. At the same time he shivered. "N-no...." Then he swallowed. "My God, Coburn! It's true!" "Yes," said Coburn bitterly, "or you're as crazy as I am."