"What happened?"
"Nothing exactly—happened. I don't quite know how to describe it." She hurried them down the corridor and opened a door into a large children's playroom. "See what you think."
The boy sat stolidly in the corner of the room. He looked up as they came in, but there was no flicker of recognition or pleasure on his pale face. The monitor helmet was still on his head. He just sat there, gripping a toy fire engine tightly in his hands.
Lessing crossed the room swiftly. "Tommy," he said.
The boy didn't even look at him. He stared stupidly at the fire engine.
"Tommy!" Lessing reached out for the toy. The boy drew back in terror, clutching it to his chest. "Go away," he choked. "Go away, go away—" When Lessing persisted the boy bent over swiftly and bit him hard on the hand.
Lessing sat down on the table. "Tommy, listen to me." His voice was gentle. "I won't try to take it again. I promise."
"Go away."
"Do you know who I am?"
Tommy's eyes shifted haltingly to Lessing's face. He nodded. "Go away."