"I wish we knew what Hermione had used on the coins," Hannah said with a sigh. "We just need more of them, so that we're not having to pass notes or whisper to people like me who haven't got theirs anymore." She frowned, wishing that she could remember what she had done with the Galleon, but the point of the thing had been that it wasn't suspicious due to its ordinary nature - the very thing that made it lose-able. "I can only remember it was a N.E.W.T. level charm and I think it started with a C. Or a P. Maybe."