pillars with more carved serpents that brace the ceiling. A colossal statue of Salazar Slytherin, looking ancient and monkey-like, is at the centre. The Basilisk rested inside the statue and emerged from its mouth when the Heir of Slytherin, Tom Riddle, summoned it. In his second year at Hogwarts, Harry uses Parseltongue to open the chamber and destroys the diary containing the embodied memory of a 16-year-old Tom Riddle from his own days at Hogwarts and also slays the basilisk. It is later revealed that the diary was a Horcrux. In Deathly Hallows, Ron and Hermione enter the Chamber. Ron opens the door (despite not speaking Parseltongue) by imitating sounds he heard Harry use to open Slytherin's locket. They pull a basilisk fang from its skeleton to use to destroy the Horcrux made from Helga Hufflepuff's cup. When Tom Riddle opened the Chamber, Myrtle was sulking in a stall after being teased by student Olive Hornby. She opened the door, intending to tell him to leave, but died immediately upon meeting the Basilisk's gaze and decided to become a ghost to get revenge on Hornby. The bathroom remains operational, but is rarely used by students because of Myrtle's disagreeable presence and her habit of flooding it when she is distraught. The film's depiction of the Chamber has snake heads in place of the pillars and Slytherin's statue is only his head. Rowling reveals in the book Harry Potter Page to Screen; The Complete Filmmaking Journey that the Chamber has flooded since its creation under unknown circumstances. As shown in Deathly Hallows, the Chamber of Secrets does not appear on the Marauder's Map. Passages There are usually seven secret passages in and out of the school, and in addition, the series describes the use of twin vanishing cabinets to create another. Filch knows of just four of these, while the Marauders (James Potter, Sirius Black, Remus Lupin and Peter Pettigrew) and the Weasley twins know of all seven, though where some lead is unknown. The Room of Requirement may, on occasion, create an eighth passage out of the school. The only known instance of this occurring is a passage to the Hog's Head that forms in Deathly Hallows. Due to the nature of the Room of Requirement, it is possible that several passages to different locations could be accessed from the Room. The three passages out of Hogwarts that Filch does