(This is also not a thing, as Harry knows firsthand. The locket has an "S" on it for Salazar Slytherin, its original owner.) Furious, Harry stuns Umbridge and the trio help Mary escape before ...

Salazar Slytherin’s hidden chamber has gone undiscovered ... using the same sounds Harry used to open a magically sealed locket earlier that very year. Of course, Ron himself seemed to imply ...