Robert got up, still chuckling, and behind it all she could see the last shattered remains of the other Robert, the real little boy this alien thing had usurped, howling in maniac terror, screeching to be let out.

She ran.

She fled screaming down the corridor, and the few late-leaving pupils turned to look at her with large and uncomprehending eyes. Mr Hanning jerked open his door and looked out just as she plunged through the wide glass front doors, a wild, waving scarecrow silhouetted against the bright September sky.

He ran after her, Adam's apple bobbing. “Miss Sidley! Miss Sidley!”

Robert came out of the classroom and watched curiously.

Miss Sidley neither heard nor saw. She clattered down the steps and across the sidewalk and into the street with her screams trailing behind her. There was a huge, blatting horn and then the bus was looming over her, the bus driver's face a plaster mask of fear. Air brakes whined and hissed like angry dragons.

Miss Sidley fell, and the huge wheels shuddered to a smoking stop just eight inches from her frail, brace-armored body. She lay shuddering on the pavement, hearing the crowd gather around her.

She turned over and the children were staring down at her. They were ringed in a tight little circle, like mourners around an open grave. And at the head of the grave was Robert, a small sober sexton ready to shovel the first spade of dirt into her face.

From far away, the bus driver's shaken babble: “… crazy or somethin… my God, another half a foot…”

Miss Sidley stared at the children. Their shadows covered her. Their faces were impassive. Some of them were smiling little secret smiles, and Miss Sidley knew that soon she would begin to scream again.