Hermione wasn't hungry, but she knew she needed fuel. Her energy began to return as she ate, and she took the opportunity to mull over what Harry had said.
"You know, he's been scratching his forearms for a few weeks," she said at last. "I wonder if there's something about his - "
Her voice died away as she thought back nearly ten years. "Harry? Wasn't Ron injured when we went to rescue Sirius back in fifth year? I was on so many healing potions I don't trust myself to remember."