Robin gave a violent start, and then a shuffling, reluctant movement as if prodded into action against his will.

"Get up and come here!" his brother said.

Robin, in the act of blundering to his feet, checked abruptly, as if arrested by something in the peremptory tone. "What for?" he asked, in a surly note.

"Get up," Green repeated, with grim insistence, "and come here!"

Robin grabbed at the end of the row of desks nearest to him and dragged himself slowly up. But there he hung irresolute. His heavy brows were drawn, but the eyes beneath had a frightened, hunted look. They glared at Green with a defiance so precarious that it was pathetic.

Green waited inexorably, magisterially, at his table. The sunlight had gone and the room was darkening. Very slowly Robin moved forward, dragging his feet along the bare boards. At the other end of the row of desks he halted. His eyes travelled swiftly between his brother's stern countenance and the wand of office that lay before him on the writing-table. He shivered.

"Come here!" Green said again.

He crept a little nearer like a guilty dog. His humped shoulders looked higher than usual. His eyes shone red.

Across the writing-table Green faced him. He spoke, very distinctly.

"Why did you throw that stone at Mrs. Fielding's car?"