Harry's Trifle Allergy

Set during the first book. McGonagall gets angry when Vernon Dursley tears up all of Harry's letters from Hogwarts so she take the matter to Dumbledore. Just a short little snippet of what I think the conversation was like and why Hagrid was sent to personally retrieve Harry from the shack in the sea. Also... have you ever wondered what the teachers do over the summers? Read on...