I’m re-reading the Harry Potter series from start to finish in the name of over-analysis. Spoilers ahoy.
Diagon Alley
Hagrid escorts Harry back to the mainland and into London. There, Harry is introduced to Diagon Alley, a hidden magical thoroughfare where wizards and witches do all their shopping. He visits Gringotts, the heavily guarded wizards’ bank, and buys all his needed equipment for Hogwarts, including his magic wand. He also meets a fellow first-year who comes across as an elitist jerk. After his shopping is done, Hagrid takes Harry to King’s Cross station so he can board a train for home.