Chapters 19-22:

Isabella Heathcliff is dead, and her brother returns home to Thrushcross Grange with his nephew Linton. Cathy is delighted by the thought of having a playmate her own age, however Linton is not one for "playing". He is a poor sickly, petty, child; pale and lanky, and used to having his way with everything. Almost immediatly after Edgar and Linton return from London a servent from Wuthering Heights arrives at Thrushcross Grange, demanding that Linton pack his things directly, because his father is expecting him. Edgar has no power to deny Heathcliff his son, so Linton must pack his things and leave for Wuthering Heights. The story then fast-forwards three years, and Cathy is now 16. One day, when her father is out, Cathy persuades Nelly to go on an "expedition" with her out on the moors. While Cathy runs ahead in search of birds eggs, she stumbles across Mr. Heathcliff and Hareton. They persuade her to come back to Wuthering Heights for a rest, and she goes, despite Nelly's objections. There Cathy discovers that her long lost cousin Linton has been living within four miles this whole time! she is extatic, and can't wait to resume their relationship. However when she gets home and tells her father about it, Edgar forbids her to ever go near Wuthering heights again. Beacuse they cannot see each other Cathy and Linton keep up a relationship by sending letters to one another. Soon however their average letters become love letters. This is all a part Heathcliff's master plan (in fact he composes the majority of letters being sent to Cathy). Heathcliff wishes Cathy and Linton to be married, so that his son will be the successor of Edgar's poperty and money, and then his sickly son will die, leaving Heathcliff a sthe sole heir to Thrushcross Grange. However once Nelly discovers the love letters, she puts and end to it.