|"Are you a wizard or not?"
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- " [...] running down the nearest flight of stairs, but Peeves merely slid down the banister on his back beside him."
The first-floor corridor and Serpentine Corridor are connected by a staircase, at the bottom of which is Minerva McGonagall's office. Harry Potter used it to deliver a note to McGonagall from Dolores Umbridge during a Defence Against the Dark Arts lesson in Classroom 3C.
- Harry Potter and the Order of the Phoenix (First appearance)
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