Lockwood, true to his word, travels to Wuthering Heights to end his tenancy at the Grange. He brings young Catherine a note from Nelly. Hareton first appropriates the note, but when Catherine cries, he gives it back to her. He has been struggling to learn to read and to acquire an education. Meanwhile, Catherine has been starving for books, as Heathcliff confiscated her collection. Catherine mocks Hareton’s struggles to learn, angering him, but she admits that she does not want to hinder his education. Still, Hareton feels humiliated, and he throws his books into the fire.
Heathcliff returns, and on entering the house, he notes that Hareton has begun increasingly to resemble his aunt Catherine—so much so that he can hardly bear to see him. Lockwood passes a cheerless meal with Heathcliff and Hareton, and then departs the manor. As he leaves, he considers what a bleak place it is, full of dreary people. He muses further that it would have been like a fairy tale for young Catherine had she fallen in love with him and left Wuthering Heights for a more pleasant environment.
About six months later—Lockwood remained at the Grange until late winter, 1802, and it is now September, 1802—Lockwood writes in his diary that he has traveled again to the vicinity of the moors. There, he tries to pay a visit to Nelly at Thrushcross Grange, but discovers that she has moved back to Wuthering Heights. He rides to the manor, where he talks to Nelly and hears the news of the intervening months. Zillah has departed Wuthering Heights, and Heathcliff has given the position to Nelly. Catherine has admitted to Nelly that she feels guilty for having mocked Hareton’s attempt to learn to read. One day, Hareton accidentally shoots himself, and is forced to remain indoors to recuperate. At first, he and Catherine quarrel, but they finally make up and agree to get along. To show her good will, Catherine gives Hareton a book, promising to teach him to read and never to mock him again. Nelly says that the two young people have gradually grown to love and trust each other, and that the day they are married will be her proudest day.
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At breakfast the morning after Catherine gives Hareton the book, she and Heathcliff become embroiled in an argument over her inheritance and her relationship with Hareton. Heathcliff seizes her and nearly strikes her, but, looking into her face, he suddenly lets her go—apparently having seen something in her eyes that reminds him of her mother. Nelly speculates to Lockwood that so many reminders of the dead Catherine seem to have changed Heathcliff. In fact, he has confided to Nelly that he no longer has the desire to carry out his revenge on young Catherine and Hareton.
As time passes, Heathcliff becomes more and more solitary and begins to eat less and less, eventually taking only one meal a day. A few days after the incident at breakfast, he spends the entire night out walking, and he returns in a strange, wildly ebullient mood. He tells Nelly that last night he stood on the threshold of hell but now has reached sight of heaven. He refuses all food. He also insists that he be left alone—he wants to have Wuthering Heights to himself, he says. He seems to see an apparition before him, and to communicate with it, though Nelly can see nothing. Heathcliff’s behavior becomes increasingly strange; he begins to murmur Catherine’s name, and insists that Nelly remember his burial wishes. Soon, Nelly finds him dead. She tells Lockwood that he has since been buried, and that young Catherine and Hareton shall soon marry. They will wed on New Year’s Day and move to Thrushcross Grange.
The young lovers now return to the house from outside, and Lockwood feels an overpowering desire to leave. He hurriedly exits through the kitchen, tossing a gold sovereign to Joseph on his way out. He finds his way through the wild moors to the churchyard, where he discovers the graves of Edgar, Catherine, and Heathcliff. Although the villagers claim that they have seen Heathcliff’s ghost wandering about in the company of a second spirit, Lockwood wonders how anyone could imagine unquiet slumbers for the persons that lie in such quiet earth.