My bride’s mother I had never seen: I understood she was dead. The honeymoon over, I learned my mistake; she was only mad, and shut up in a lunatic asylum. There was a younger brother, too – a complete dumb idiot. The elder one, whom you have seen (and whom I cannot hate, whilst I abhor all his kindred, because he has some grains of affection in his feeble mind, shown in the continued interest he takes in his wretched sister, and also in a dog-like attachment he once bore me), will probably be in the same state one day. My father and my brother Rowland knew all this; but they thought only of the thirty thousand pounds, and joined in the plot against me.
These were vile discoveries; but except for the treachery of concealment, I should have made them no subject of reproach to my wife, even when I found her nature wholly alien to mine, her tastes obnoxious to me, her cast of mind common, low, narrow, and singularly incapable of being led to anything higher, expanded to anything larger – when I found that I could not pass a single evening, nor even a single hour of the day with her in comfort; that kindly conversation could not be sustained between us, because whatever topic I started, immediately received from her a turn at once coarse and trite, perverse and imbecile – when I perceived that I should never have a quiet or settled household, because no servant would bear the continued outbreaks of her violent and unreasonable temper, or the vexations of her absurd, contradictory, exacting orders…I lived with that woman upstairs four years, and before that time she had tried me indeed: her character ripened and developed with frightful rapidity; her vices sprang up fast and rank: they were so strong, only cruelty could check them; and I would not use cruelty. What a pigmy intellect she had – and what giant propensities!
– Charlotte Bronte
Jane Eyre, Chapter 27. Rochester is describing his clandestine wife Bertha Mason, the mad woman in the attic. Only after he wed her in a marriage arranged by his father, did he learn of her violence and temper. He also discovered that her mother was mad and shut up in a lunatic asylum. He describes his wife’s behavioral and cognitive decline during their first four years of marriage.