"Well, I've no time to waste. I've come here for two reasons, Dr. Wong. We both want a booster shot for Blue Martian. Ten years is a long time, and there's been this epidemic." "Which is now under control." "That may be, but I still want a booster. You Research people don't always know as much as you think you do. When that's done, I want a detailed report of your progress on White Martian." "I shall be happy to give it," said David. "If you will go directly to my office, I'll pick up the vaccine and syringes, and be with you in a few minutes." Marley and Officer Magnun marched to the door, and David followed, standing aside to let Lanza precede him. Lanza hesitated there, staring at the floor. Then he smiled and looked directly at David. "Beautiful spring weather we are having. I'm wondering about the marvelous order of nature. Did you happen to notice, this morning, whether the Sun did actually rise in the east?" David stared at the retreating back. There was no longer any doubt in his mind. Lanza knew. What was he going to do? "Hurry up, Doctor," said Officer Magnun from the doorway. "Right away." He opened the refrigerator and inspected the two groups of red-capped vials sitting on the shelf. He had no time to think, no time to weigh pros and cons; he could only act. Choosing two vials, he added them to the sterile kit from the autoclave, and took a last look around. He noticed his watch still hanging on the wall, and the lab coat which covered his leather pencil case. He started to take them, then slowly dropped his hand and touched the intercom. "Get me Dr. Karl Haslam." "You're keeping the Leader waiting," said Magnun, but David paid no attention. "Dr. Haslam? Dr. Wong speaking. I may be a little late getting up to see those precipitates of yours. But you keep them simmering, just in case. It's very probable that the antibody curve will rise.... Yes, I'll let you know if I can." Magnun followed him to the office, then strolled away for a chat with Watchguard Jones. David put his things on his desk and made his preparations in businesslike fashion while Marley and Lanza glanced curiously around the office. He watched apprehensively as Marley inspected the bookcase, then turned away. "I never could understand why Research needs so many books," he remarked. "Please roll up your sleeve, Leader Marley. I'm ready for you now." Deftly he assembled the syringe, filled it to the two centimeter mark, and scrubbed the arm presented to him. "Ready?" He inserted the needle and slowly expelled the fluid. Then, taking a fresh syringe, he repeated the operation, filling from the second vial. "Why do those bottles have different numbers?" asked Marley. "Aren't we getting the same thing?" "Certainly. Just lab routine, so we can keep track of how many units have been used from our stock. There, that does it, Lanza. Both of you will be perfectly safe for a good many years to come."