But neither planet was truly their home; they had met and married on Luna and had pursued their researches in planetology in many sectors of the solar system. Don himself had been born out in space and his birth certificate, issued by the Federation, had left the question of his nationality open. He could claim dual citizenship by parental derivation. He did not think of himself as a Venus colonial; it had been so long since his family had last visited Venus that the place had grown unreal in his mind. On the other hand he had been eleven years old before he had ever rested his eyes on the lovely hills of Earth.

"I'm a citizen of the System," he said harshly.

"Mmmm-" said the headmaster. "That's a fine phrase and perhaps someday it will mean something. In the meantime, speaking as a friend, I agree with your parents. Mars is likely to be neutral territory; you'll be safe there. Again, speaking as your friend-things may get a little rough here for anyone whose loyalty is not perfectly clear."

"Nobody has any business questioning my loyalty under the law, I count as native born!"

The man did not answer. Don burst out, "The whole thing is silly! If the Federation wasn't trying to bleed Venus white there wouldn't be any war talk."

Reeves stood up. "That will be all, Don. I'm not going to argue politics with you."

"It's true! Read Chamberlain's Theory of Colonial Expansion!"

Reeves seemed startled. "Where did you lay hands on that book? Not in the school library."

Don did not answer. His father had sent it to him but had cautioned him not to let it be seen; it was one of the suppressed books-on Earth, at least. Reeves went on, "Don, have you been dealing with a booklegger?"

Don remained silent. "Answer me!"

Presently Reeves took a deep breath and said, "Never mind. Go up to your room and pack. The copter will take you to Albuquerque at one o'clock."