chunk: Twenty-one-year-old Lucilla Finch, the independently wealthy daughter of the rector of Dimchurch, Sussex, has been blind since infancy. Shortly after the narrator, Madame Pratolungo, arrives to serve as her paid companion, Lucilla falls in love with Oscar Dubourg, her shy and reclusive neighbour, also wealthy, who devotes himself to craftsmanship in precious metals.
  After being attacked and knocked unconscious by robbers, Oscar is nursed by Lucilla and falls in love with her, and the couple become engaged. Their plans are jeopardized by Oscar's epilepsy, a result of the blow to his head. The only effective treatment, a silver compound, has the side-effect of turning his skin a permanent, dark blue-grey. Despite her blindness, Lucilla suffers a violent phobia of dark colours, including dark-complexioned people, and family and friends conceal Oscar's condition from her.