Gavir leaped at the Earthmen. He clubbed the man with the whip across the face. As the others rushed in, Gavir flailed about him with long arms and heavy fists.

He began to enjoy it. It was rare that a Martian had an opportunity to knock Earthmen down. The mood of the Song of Going to Hunt came over him. He sprang free of his attackers and drew his glittering narvoon.

The man with the whip yelled. They looked at his knife, and then all at once turned and ran. Gavir drew back his arm and threw the knife with a practiced catapult-snap of shoulder, elbow, and wrist. To his surprise, the blade clattered to the street far short of his retreating enemies. Then he remembered: you couldn't throw far in the gravity of Earth.

The Earthmen disappeared into a lift-force field. Gavir decided not to pursue them. He walked forward and picked up his narvoon, and saw that the street on which it lay was solid black pavement, not a force-field. He must be in the lowest level of the city. He didn't know his way around; he might meet more enemies. He forgot about the books he'd wanted, and began to search for his hotel.

hen he got back to his room, he went immediately to bed. He slept late.

Malcomb woke him at 1100. Gavir told Malcomb about the strangely-dressed men who had tried to kill him.

"I told you not to wander around alone."

"But you did not tell me that Earthmen might try to kill me. You have told me that Earthmen are good and peace-loving, that there have been no acts of violence on Earth for many decades. You have told me that only the MDC men are exceptions, because they are living off Earth, and this somehow makes them different."

"Well, those people you ran into are another exception."

"Why?"

"You know about the Regeneration and Rejuvenation treatment we have here on Earth. A variation of it was given you to acclimate you to Earth's gravity and atmosphere. Well, since the R&R treatment was developed, we Earthmen have a life-expectancy of about one hundred fifty years. Those people who attacked you were Century-Plus. They are over a hundred years old, but as healthy, physically, as ever."

"What is wrong with them?"

"They seem to have outgrown their Ethical Conditioning. They live wildly. Violently. It's a problem without precedent, 

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