"Of course he's not following a dark wizard," Hermione said, rolling her eyes and looking at Harry. "The Quibbler's always been on your side, hasn't it? Even now, and I'm sure it's been dangerous for him. So it isn't that. I think.... right, I think it might be something else. I think it might be a key." Like on a map, but she didn't have any idea what it could mean.
"Grindewald had to have gotten it from somewhere, and Lovegood's the first person I've ever seen with it. It's barely even mentioned in the books I've tried, and only vaguely. I think he's the best bet."