"Don't doubt that," Ron said to Harry over Hermione's head in return, "actually a bit shocked you didn't do it anyway. God knows I wanted to beat myself bloody over that."
Then he looked back at Hermione. "The brains? The ones I summoned? That was...his brain that left the scars?" He stared at her for a long time while his mind worked over what she'd said, then his eyes reluctantly went to his arms.