Albus Dumbledore, then Transfiguration Professor, distrusted Riddle and kept a close watch on him after that.As it was no longer safe to open the Chamber of Secrets, Riddle, not wanting his research to be for naught, created a Diary in which to preserve his sixteen year old self and hoped it would one day lead someone to finish Salazar Slytherin's "noble quest." The diary was also made a Horcrux with the murder of Myrtle.At some point between the death of Myrtle and the 1992-1993 school year, the Chamber flooded under unknown circumstances."He was standing at the end of a long, dimly lit chamber.The presence in school at the time of a student called Corvinus Gaunt — who was a direct descendant of Slytherin —explained how the simple trapdoor was secretly protected, so that those who knew how could still access the entrance to the Chamber even after the newfangled plumbing had been placed on top of it.
According to legend, before he left, Slytherin created a secret chamber deep underground in Hogwarts Castle — known as the Chamber of Secrets. But these honest facts have been obscured by the fanciful legend of the Chamber of Secrets.The story goes that Slytherin had built a hidden chamber in the castle, of which the other founders knew nothing.They were later restored to their proper states through the use of Mandrake Restorative Draught. On 29 May, 1993, Ginny was taken down to the Chamber to die, while Riddle intended to feed off her life force in order to become fully alive again.Harry Potter, Ron Weasley, and then-Defence Against the Dark Arts Professor Gilderoy Lockhart went to the Chamber to rescue Ginny, as a message had been left that she was held prisoner there: "Her Skeleton will lie in the Chamber forever." Once in the Chamber, Harry met with the memory of Tom Riddle, which was preserved in the diary.