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
Henry Mainwaring of Pirates", on the suppression of piracy, 1618), the manuscript of which is in the British Museum. In his book, he explains what causes a desperate man to turn to piracy. He also advises the King against granting pardons to pirates. The King promptly dispatched Mainwaring to the Venetian Republic as his representative, over the protests of the Spanish ambassador. Mainwaring was knighted at Woking on 20 March 1618. He was commissioned in the Royal Navy. In 1621, he was elected Member of Parliament from Dover. Mainwaring became vice-admiral before leaving the navy in 1639. As a Royalist, he served