Chapter 4 - "The Keeper of the Keys" - In which Hagrid arrives at the hut and informs Harry that he is a wizard and has been accepted into Hogwarts. Harry also learns the truth about the deaths of his parents and the origin of the scar on his forehead, much to the chagrin of his uncle.
Strange Letters Arrive for Harry
For the fourth straight day letters arrive for Harry, but [Uncle Vernon] stays home from work to burn the letters and board up the cracks on the outside of the house.
A fifth set of letters arrive for Harry, inside the [Dursleys]' delivery of two dozen eggs.
After letters penetrate the [Dursleys]' chimney and begin attacking them, [Uncle Vernon] takes the family and drives all day long, muttering, finally stopping at a hotel in Cokeworth.
A Visitor to the Hut-On-The-Rock
After letters are delivered to Harry at the [hotel], [Uncle Vernon] drives the family to the seashore, buys a gun, and takes them out in a boat to the hut-on-the-rock, where they all uncomfortably go to bed.
Trying unsuccessfully to sleep on the floor, Harry instead counts down the minutes to midnight, the start of his eleventh birthday, hearing noises outside and finally a knock on the door.
Harry Meets Hagrid