In the 1847 novel "Jane Eyre" by Charlotte Brontë, as she prepares for her wedding, Jane's forebodings arise when a strange woman sneaks into her room one night and rips Jane's wedding veil in two. As with other bad events, Edward Fairfax Rochester attributes the incident to Grace Poole, one of his servants. During the wedding ceremony, however, Mr Mason and a lawyer declare that Mr Rochester cannot marry because he is already married to Mr Mason's sister, Bertha. Mr Rochester admits this is true but explains that his father tricked him into the marriage. Once they were united, he discovered that she was rapidly descending into congenital madness. So, he eventually locked her away in Thornfield Hall, hiring Grace Poole as a nurse to look after her. When Grace gets drunk, Rochester's wife escapes and causes the strange happenings at Thornfield.

It turns out that Jane's uncle, Mr John Eyre, is a friend of Mr Mason's and was visited by him soon after Mr Eyre received Jane's letter about her impending marriage. After the marriage ceremony is broken off, Mr Rochester asks Jane to go with him to the south of France and live with him as husband and wife, even though they cannot be married. Jane is tempted but realizes that she will lose herself and her integrity if she allows her passion for a married man to consume her. She must stay true to her Christian values and beliefs. Refusing to go against her principles, and despite her love for Rochester, Jane leaves Thornfield Hall.

More Info: en.wikipedia.org