cigarette, Corporal?"

"No, sir."

The Doctor lit one himself, resting his arm on the edge of the chair. "Corporal, you must realize that there are very few men who become plants, especially on such short notice. I have to admit you are the first person who has ever told me such a thing."

"Yes, sir, I realize it's quite rare."

"You can understand why I'm interested, then. When you say you're a plant, you mean you're not capable of mobility? Or do you mean you're a vegetable, as opposed to an animal? Or just what?"

The Corporal looked away. "I can't tell you any more," he murmured. "I'm sorry, sir."

"Well, would you mind telling me how you became a plant?"

Corporal Westerburg hesitated. He stared down at the floor, then out the window at the spaceport, then at a fly on the desk. At last he stood up, getting slowly to his feet. "I can't even tell you that, sir," he said.

"You can't? Why not?"

"Because—because I promised not to."

The room was silent. Doctor Harris rose, too, and they both stood facing each other. Harris frowned, rubbing his jaw. "Corporal, just who did you promise?"

The

"I can't even tell you that, sir. I'm sorry."

The Doctor considered this. At last he went to the door and opened it. "All right, Corporal. You may go now. And thanks for your time."

"I'm sorry I'm not more helpful." The Corporal went slowly out and Harris closed the door after him. Then he went across his office to the vidphone. He rang Commander Cox's letter. A moment later the beefy good-natured face of the Base Commander appeared.

"Cox, this is Harris. I talked to him, all right. All I could get is the statement that he's a plant. What else is there? What kind of behavior pattern?"

"Well," Cox said, "the first thing they noticed was that he wouldn't do any work. The Garrison Chief reported that this Westerburg would wander off outside the Garrison and just sit, all day 

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