Start to get curious about why the letters are so important
From Thread 1
The next day, Sunday, Uncle Vernon looks tired, but happy.
"Today's Sunday, Harry. You know what that means! No post on Sundays!" He laughs like a maniac. Suddenly, a letter flies from the chimney and hits him in the face. More and more letters fly out. Soon the floor is covered. Uncle Vernon screams and dives at you.