"Rawlins. The roof on tower three. Check it right away. I think...." Kearns' body abruptly went rigid; he fell across the control-room table. * * * * * Dan Kearns came to on the floor of the control-room with the doctor working over him. "How do you feel?" the doctor asked. "Like I've been sitting in an electric chair." "You'll be all right," the doctor said. "Compared to Stevens you got a mild dose." Dan looked around him. He saw Rawlins' boots and glanced upward. "Did you check the tower?" "Yep, we found him--dead. Just like Stevens. He was one of Roehm's men all right. He had a flashlight. We tried it on one of the doc's white rats." Rawlins shook his head. "Stevens must have gone through hell." Suddenly he stared down at Dan. "But how...?" Dan smiled. He lifted up his gloved hand. In it was a small rectangular signaling mirror. "I reflected it right back at him."