Draco Malfoy makes his first appearance in the series when he and Harry meet while being fitted for school robes at Madam Malkin's, a clothing shop in Diagon Alley. Not realising that the boy in the store is Harry Potter—a child whose parents were murdered when he was one year old by the powerful dark wizard Lord Voldemort—Draco engages him in (for him) polite conversation. Harry, however, is alienated by the arrogance of Draco, who asks whether the orphan's parents are "our kind" (pure-blood wizards). Draco then proclaims that "the other sort" (Muggle-borns) should not be allowed at Hogwarts School of Witchcraft and Wizardry, because "they've never been brought up to know our ways". The two boys part without introductions, but meet again on the Hogwarts Express. After Draco ridicules Ron Weasley's family, Harry rejects his offer of friendship, demonstrated by a handshake, and their mutual antagonism is born. According to Rowling, Malfoy originally makes an effort to be Harry's friend because "it will be cool to turn up at the school being Harry Potter's friend, because Harry is so famous. " However, Harry did not want Malfoy as a friend because he "has been so rude about Rubeus Hagrid and about Ron, who Harry likes so much". At the first years' Sorting Ceremony, the Sorting Hat places him into Slytherin (barely touching Draco's head), the house that has developed all of the bad wizards, where he becomes an instant favourite of Potions teacher and Slytherin Head of House, Severus Snape, so-called follower of Lord Voldemort. Draco attempts to get Harry expelled by tricking him into participating in a midnight wizard's duel after secretly informing Argus Filch in advance, but the plan fails when Harry evades Filch and safely makes it back to his dormitory.