Chapter 21: Catherine is upset by Linton's disappearance. When she turns 16, Nelly spots Catherine speaking with Hareton and Heathcliff on the moors. Heathcliff invites her to the house to visit his son, who Catherine does not realize is Linton. Linton is too weak and whiny to show Catherine around, so Hareton takes her, who insults him the entire time for his ignorance. Heathcliff forces Linton to go and tells Nelly his desire for Linton and Catherine to marry. Linton and Catherine correspond regularly until forced to stop.
Chapter 22: Edgar becomes very ill. Catherine comes across Heathcliff, who chastises Catherine for her poor treatment of Linton, who is dying from a broken heart. Catherine convinces Nelly to take her to Wuthering Heights.
Chapter 23: Linton whines. Catherine shoves him. Linton whines more and begs Catherine to visit more often. Nelly becomes ill. Catherine takes care of Nelly and her father during the day and rides to Wuthering Heights to visit Linton in the evening.
Chapter 24: Nelly learns of Catherine's visits and tells Edgar. Edgar prohibits further visits.
Chapter 25: Edgar nears death. He allows Catherine to visit Linton on the moors, not realizing that Linton is just as sick as he.
Chapter 26: Nelly and Catherine meet Linton near Wuthering Heights. Linton appears very ill and fearfully looks over his shoulder frequently.
Chapter 27: Catherine and Nelly are duped by Linton and forced by Heathcliff to enter the house, at which time he locks them in and refuses to release them until Linton and Catherine are married. Catherine is permitted to leave. Nelly is locked in a room for five days.
Chapter 28: Nelly is freed. She confronts Linton who claims Catherine is locked up and that he now owns everything on account of their marriage. Nelly returns to Thrushcross Grange, to the delight of the other servants who thought she was dead. Catherine returns shortly before her father's death.
Chapter 29: After Edgar's death, Heathcliff arrives to retrieve Catherine. He tells Nelly that he had the sexton remove old Catherine's coffin so he could look at her and that he paid the sexton to remove the side of her coffin not facing Edgar. Heathcliff puts in his will that he wishes to be buried next to Catherine and have the side of his coffin removed so the two can mingle.