Harry borrowed Ron’s quill, scribbled ‘Yes, please, see you later’ on the back of the note and sent Hedwig off again. It was lucky that Harry had tea with Hagrid to look forward to, because the Potions lesson turned out to be the worst thing that had happened to him so far. At the start-of-term banquet, Harry had got the idea that Professor Snape disliked him. By the end of the first Potions lesson, he knew he’d been wrong. Snape didn’t dislike Harry – he hated him. Potions lessons took place down in one of the dungeons. It was colder here than up in the main castle and would have been quite creepy enough without the pickled animals floating in glass jars all around the walls.