Catherine Earnshaw's brain fever

Catherine Earnshaw's brain fever is the catastrophic physical and psychological collapse that follows her three-day self-imprisonment and starvation after a violent quarrel with Edgar Linton and Heathcliff, an illness that permanently alters her constitution, precipitates her death in childbirth, and becomes the originating trauma that shapes the next generation's fate at Wuthering Heights and Thrushcross Grange.

Causes and Onset

The fever is not a random affliction but the direct consequence of Catherine's desperate attempt to force a resolution between her husband and her soulmate. After Edgar Linton demands she choose between him and Heathcliff, Catherine locks herself in her chamber, refusing all food and communication for three days. She eats nothing but cold water during this period, and when Nelly Dean finally enters, she finds Catherine emaciated, feverish, and already slipping into delirium. The physical deprivation combines explosively with the emotional shock of being torn between the two men she loves in irreconcilable ways. Catherine herself later describes the onset as a moment when "utter blackness overwhelmed" her and she fell on the floor, her mind regressing to childhood and the grief of being separated from Heathcliff after her father's burial.

Symptoms and Delirium

The illness manifests as a violent brain fever that produces terrifying hallucinations and a complete loss of coherent identity. Catherine tears the feathers from her pillow and arranges them by species—turkey, wild duck, pigeon, moor-cock, lapwing—murmuring about Heathcliff's promise never to shoot lapwings. She stares at her reflection in a mirror and does not recognize herself, insisting that a face in the glass is a ghost haunting the room. She believes she is back in the oak-panelled bed at Wuthering Heights, a child again, and that the last seven years of her life have been erased. In her most lucid moments she begs for the window to be opened so she can feel the wind from the moor, crying that she wishes she were "a girl again, half savage and hardy, and free." The doctor, Kenneth, pronounces her dangerously ill and warns that the greater danger is not death but "permanent alienation of intellect."

Edgar's Vigil and Gradual Recovery

Edgar Linton nurses Catherine with a devotion that Nelly Dean compares to a mother tending an only child. Day and night he watches over her, patiently enduring the irritability and irrational demands that the fever produces. Kenneth warns Edgar that what he saves from the grave will only be "a mere ruin of humanity," but Edgar refuses to abandon hope. When Catherine finally leaves her chamber at the beginning of March, Edgar has placed a handful of golden crocuses on her pillow—the earliest flowers from the Heights—and she weeps as she gathers them. The recovery is partial at best: her appearance is altered, with a dreamy and melancholy softness replacing the flash of her eyes, and she seems to look "beyond, and far beyond" the material world. Nelly observes that the change stamps her as "one doomed to decay."

Lasting Consequences and Death

The brain fever leaves Catherine permanently weakened in body and mind. She never fully regains her former vitality or spirit, and her pregnancy—which the household hopes will produce an heir to secure the estate from Heathcliff—proves fatal. On the night of her daughter's birth, a puny seven-months' child, Catherine dies two hours later, having never recovered sufficient consciousness to recognize either Heathcliff or Edgar. Her final moments are peaceful: her brow smooth, her lips wearing the expression of a smile, and Nelly Dean reflects that "no angel in heaven could be more beautiful than she appeared." The fever thus completes the destruction that the quarrel began, leaving Edgar a widower, Heathcliff a man possessed by her ghost, and the infant Catherine Linton to grow up in the shadow of a mother she never knew.

Thematic Significance

Catherine's brain fever functions as the novel's central pivot between the first and second generations. It is the physical manifestation of the impossible choice between the wild, elemental love she shares with Heathcliff and the civilized, comfortable life she chooses with Edgar Linton. The illness literalizes her own declaration that her love for Heathcliff "resembles the eternal rocks beneath" while her love for Linton is "like the foliage in the woods" that time will change. The fever does not kill her immediately but transforms her into a ghost-in-waiting, and her death in childbirth ensures that the conflict between the two families will be replayed in the next generation. The brain fever is thus not merely a plot device but the novel's most powerful image of how passionate attachment, when denied its proper expression, destroys the body that houses it.