"Yes... You see we’ve discovered that the Dark Lord made more than one Horcrux... so far we have found a locket belonging to Slytherin, a chalice belonging to Hufflepuff and Tom Riddle’s Diary that Mr. Potter destroyed in his second year... We believe that there may be something belonging to Gryffindor and Ravenclaw that were made into a horcrux... While we aren’t sure what it could be, I am of the opinion that one of them might be hidden in the room of lost things... you see many years ago, when I had just started teaching at Hogwarts, Tom Riddle had come to ask Dumbledore for a job as the Defence agents the Dark arts professor... I believe he like Professor Slughorn wanted to recruit as many bright young minds as possible and radicalise them at an early age... He was denied the job and apparently he cursed the position... or so it has been believed... regardless, the point is that when he had come to visit headmaster Dumbledore, all the staff offices were located on the 7th floor..."Hermione’s eyes glimmered with understanding