"Four. Right." Hermione took a deep, cleansing breath and reached back to unpin her hair. "At least we know what it is now. The question is, how did it happen?" She thought back to her brush with Voldemort and frowned. "I was still shaky when the spirits tried to come through the Veil, so why did this fellow go after Ron and not me? Or someone like Professor Blank who doesn't have much combat experience? What made Ron vulnerable?"