What are chapters 9-12 of Harry Potter and the Philosopher's Stone about?

Answer 1

Chapters 9-12 are set in Hogwarts.

Harry is challenged to a Midnight Duel by Draco Malfoy, but is set up and forced to run away from Filch to avoid being expelled. During their escape Harry, Ron, Hermione and Neville find a three-headed dog guarding a trap door. They then find out Hagrid is the owner of the dog and that what is hidden underneath belongs to somebody called Nicolas Flamel, who they set out to find.

Ron insults Hermione and she hides in the girls bathroom during the Halloween feast. Harry and Ron save her after a troll is let into the building and the three become friends.

Harry wins his first Quidditch match against Slytherin, despite somebody (they presume Professor Snape) trying to jinx him off his broomstick.

Harry is given an invisibility cloak for Christmas. He uses it to sneak into the restricted section so he can find out who Flamel is but makes a noise and has to hide from Filch. Inside the room, he finds a mirror that shows him his entire family but shows Ron as the Quidditch captain and head boy. Dumbledore explains that it is called the Mirror of Erised and shows your hearts deepest desire.