Katharine Parnell, known before her second marriage as Katharine O'Shea, and usually called by friends Katie O'Shea and by enemies Kitty O'Shea, was an English woman of aristocratic background, whose decade-long secret adultery with Charles Stewart Parnell led to a widely publicized divorce in 1890 and his political downfall.
Katharine married Captain William O'Shea in 1867, a Catholic Nationalist MP for County Clare from whom she separated around 1875. Katharine first met Parnell in 1880 and began an affair with him. Three of Katharine's children were fathered by Parnell; the first, Claude Sophie, died early in 1882. The others were Claire and Katharine. Captain O'Shea knew about the relationship. He challenged Parnell to a duel in 1881 and initially forbade his estranged wife to see him, although she said that he encouraged her in the relationship. However, he kept publicly quiet for several years. Although their relationship was a subject of gossip in London political circles from 1881, later public knowledge of the affair in an England governed by "Victorian morality" with a "nonconformist conscience" created a huge scandal, as adultery was prohibited by the Ten Commandments. Out of her family connection to the Liberal Party, Katharine acted as liaison between Parnell and Gladstone during negotiations prior to the introduction of the First Irish Home Rule Bill in April 1886. Parnell moved to her home in Eltham, close to the London-Kent border, that summer. Captain O'Shea filed for divorce in 1889; his reasons are a matter for speculation. He may have had political motives. Alternatively, it was claimed that he had been hoping for an inheritance from Katharine's rich aunt whom he had expected to die earlier, but when she died in 1889 her money was left in trust to cousins. After the divorce the court awarded custody of Katharine O'Shea and C.S. Parnell's two surviving daughters to her ex-husband. Katharine's November divorce proceedings from Captain O'Shea, in which Parnell was named as co-respondent, led to Parnell's being deserted by a majority of his own Irish Parliamentary Party and to his downfall as its leader in December 1890. Catholic Ireland felt a profound sense of shock when Katharine broke the vows of her previous Catholic marriage by marrying Parnell on 25 June 1891. With Parnell's political life and his health essentially ruined, he died at the age of 45 in Hove on 6 October 1891 in her arms, less than four months after their marriage. The cause was cancer of the stomach, possibly complicated by coronary heart disease inherited from his grandfather and father, who also died prematurely. Katharine published a biography of Parnell in 1914 as "Katharine O'Shea ". Though to her friends she was known as Katie O'Shea, Parnell's enemies, in order to damage him personally, called her "Kitty O'Shea" because at that time "kitty", as well as being a Hiberno-English version of Catherine/Katherine/Katharine, was also a slang term for a prostitute. She lived the rest of her life in relative obscurity, and is buried in Littlehampton, Sussex, England. Her daughter Claire O'Shea married Dr. Bertram Sydney Osmund Maunsell, and their only son Assheton Clare Bowyer-Lane Maunsell died of enteric fever while serving with the British army in India. Katharine O'Shea married Arthur Moule of the East Lancashire Regiment and died in an asylum. Captain Henry Harrison, MP, who had acted as Parnell's bodyguard and aide-de-camp, devoted himself after Parnell's death to the service of his widow Katharine. From her he heard a completely different version of the events surrounding the divorce issue from that which had appeared in the press, and this was to form the seed of his later two books defending Parnell published in 1931 and 1938. They had a major impact on Irish historiography, leading to a more favourable view of Parnell's role in the O’Shea affair.
