ward away vampires and in one part they even enchant snowballs to hit it. Harry first meets Quirrell at the Leaky Cauldron, while being escorted by Hagrid to Diagon Alley to shop for school supplies. Quirrell is next seen at Hogwarts conversing with Snape at the start-of-term banquet, and then regularly while teaching Defence Against the Dark Arts lessons. During the school's Halloween banquet, Quirrell appears in the Great Hall to warn staff and students of a troll in the dungeons and then he faints, so he can freely make his way to the third-floor corridor where the Stone is hidden. Snape who, apparently, already suspected Quirrell was up to something, goes to the third floor in order to stop him. In later novels, the readers learn that Dumbledore had told Snape to keep an eye on the Defence Against the Dark Arts professor. Quirrell is unable to get to the Stone, but in the process, Snape is bitten by Fluffy. When Harry and his friends see that Snape has been bitten, they begin to suspect Snape is after the Stone for himself. While playing Quidditch, Harry is almost thrown off his broom by some sort of curse and he, Ron, and Hermione believe it is Snape who is responsible. They begin to suspect that Snape is trying to steal the Stone hidden in a secret chamber in Hogwarts; when Harry finally arrives in the chamber he discovers that it is not Snape, but Quirrell who is the real villain. During his European travels, Quirrell discovered the barely-alive Voldemort, who had been in hiding since his failed bid to kill Harry as an infant. Quirrell became attracted to Voldemort's offers of power, and returned to Britain with the Dark Lord. Quirrell addresses and refers to Voldemort by that name, rather than "The Dark Lord" as other Death Eaters do. Initially, Voldemort allowed Quirrell to act autonomously – Quirrell was able to shake hands with Harry in the Leaky Cauldron, and was not wearing the turban, meaning that Voldemort was not possessing him (though this changes in the film version, where Quirrell wears the turban at the Leaky Cauldron and refuses to shake Harry's hand). Voldemort first used Quirrell in a plan to steal the Philosopher's Stone from its vault in Gringotts Bank, where it had been deposited for safekeeping by Dumbledore. But Dumbledore had already sent Hagrid on a mission