That made the ninth android unapproachable, so his counterpart-leader withdrew to the end of the corridor and waited until Doctor Corson came out. He followed Corson outside and, from the back seat of another taxi, never lost sight of the convertible until Rhoda Kane drove it into the garage under her apartment building. From the street, the tenth android saw Rhoda and Frank enter the elevator. As soon as the door closed, he was in the outer lobby, watching as the numbers progressed upward on the elevator dial. The hand stopped at 21. This was noted and recorded, after which the tenth android called a finish to the night's activities and retired to the small room he'd rented on a quiet street on the Lower East Side where, if you bothered no one, no one would bother you. He was back the next morning, however, and that's when his unavoidable contact with Frank Corson on the sidewalk was made. He noted the surprise on Corson's face, but the logical situation did not develop because Corson did not make an issue of the meeting. He allowed the tenth android to go on his way. A nonsynthetic man would have wondered at this and thanked his own good luck. Not so with the android. He knew nothing whatever about luck. He accepted this bit of good fortune in exactly the same manner he would have faced its opposite, and when Frank Corson boarded a bus, a taxicab pulled out of a side street and followed. The cab waited, in front of the Park Hill Hospital. When Frank Corson and the ninth android emerged, two cabs, not one, wheeled down Manhattan and into Greenwich Village. Thus it was that some ten minutes after Frank Corson went back to his duties at the Park Hill Hospital, there was a knock on the door of his room in Greenwich Village. The ninth android opened the door. The tenth android entered. The ninth android hobbled back to his chair and waited quietly. The tenth android looked both ways in the corridor and then closed the door. He walked to the chair and stood looking down. He turned his eyes to the bulky, cast-encased leg. "It will not heal," he stated matter-of-factly. The ninth android nodded. "I--know." "That makes you useless." Another nod. "Why couldn't they have made it possible for our flesh and bone to become whole again after an--accident?" "That wasn't possible." The tenth android went to a tiny curtained-off kitchenette and returned with a knife. He put his hand on the head of the ninth android and drew it backward so that the neck muscles were taut. He raised the knife. Then he paused and looked down with a faint expression of interest in his otherwise empty eyes. "Are you afraid to die?" "I don't--know. What is it to--die?" "You become nonfunctioning." "I think I would rather not become nonfunctioning." The tenth android cut the ninth android's throat. Carefully and cleanly, he severed the big artery that carried the blood-fluid back down to the upper heart.