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 at the Central Labour College in London where he studied economics. After two years at the College, he returned to the coal face, but in 1919, Mainwaring was appointed as a Lecturer in Economics and Vice-Principal of the Central Labour College. This college, which renamed as The Labour College in 1920, was founded by the South Wales Miners' Federation and the National Union of Railwaymen, but most of the students were South Wales miners; opponents suspected the college was "class teaching for revolutionary aims". Mainwaring ran for the South Wales nomination for a candidate to be Secretary of the Miners