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
[Rubeus Hagrid] makes an entrance at the stroke of midnight by banging down the door of the [hut-on-the-rock], terrifying [Harry] and the [Dursleys].
Walking into the hut, [Hagrid] greets [Harry] with a birthday cake, introduces himself, and cooks some sausages in the fireplace.
Discovering that [Harry] knows nothing of [Hogwarts], his parents, or the wizarding world, [Hagrid] yells at the [Dursleys] - and informs [Harry] that he is a wizard, and hands him his [Hogwarts letter].
A disbelieving [Harry] learns the story of his life from [Hagrid], discovering that his parents were [head boy and girl] at [Hogwarts], that [Voldemort] killed them and tried to kill [Harry], and that [Harry] survived and destroyed [Voldemort], making him famous.