William Massey-Mainwaring William Massey-Mainwaring The Honourable William Frederick Barton Massey-Mainwaring (28 May 1845 – 12 March 1907) was an Irish art collector and Conservative Party politician in the United Kingdom. The fifth son of Eyre Massey, 3rd Baron Clarina and his wife Susan Elizabeth "née" Burton, he was originally known as William Frederick Barton Massey. Educated at Trinity College Dublin, he was called to the bar at the Inner Temple, London. In 1872 he married Isabella Anne Milman, a widow and only child of Benjamin Lee Mainwaring of Knaresborough. He assumed the surname Massey-Mainwaring on marriage. Massey-Mainwaring was a well-known art collector
William Mainwaring caused some amusement when they appealed to Labour to withdraw their candidate to stop splitting the working-class vote. Mainwaring succeeded in increasing his majority to 8,433. In the new Parliament, Mainwaring won sixth place on the ballot to introduce a Private Member's Bill and chose to try to make employers liable for injuries to workmen caused by the negligence of fellow workmen. When debated, a Conservative MP moved to reject the Bill, and the Government declared their opposition; the Bill was defeated by 146 to 85. In the next session, Mainwaring won again, this time in first place; he introduced