Sir Robert Mansell was an admiral of the English Royal Navy and a Member of Parliament, mostly for Welsh constituencies. His name was sometimes given as Sir Robert Mansfield and Sir Robert Maunsell.
In October 1600, Sir Robert's quarrel with a Norfolk neighbour, Sir John Heydon, ended in a notorious duel. Heydon's brother, Sir Christopher Heydon, was already noted for such affairs and in fact was at that moment detained in London by the Privy Council to prevent him duelling with Sir John Townshend. The Council seem to have got wind of the dispute between Mansell and Heydon, and the Lord Chief Justice wrote to Sir Robert Cecil, urging him to forestall it since the county was "already too much wrought into faction". But he was too late, and the fight took place outside Norwich: Heydon was badly wounded, and lost a hand. Both Heydons were followers of Robert Devereux, Earl of Essex, and took part in his rebellion in the following year. Mansell remained loyal to the Queen, and took an active part in arresting those implicated as accomplices.
Political and business career
In 1601, Mansel stood for Parliament as a candidate for Norfolk, the election having been delayed by the Essex Rebellion. He was defeated, perhaps because of disapproval of his duel, but was however elected as MP for King's Lynn at the same election. He later served as member for Carmarthenshire, Glamorgan and Lostwithiel. He accompanied the Earl of Nottingham on his mission to Spain in 1605. In 1606 he and his nephew, Lewis Mansell, were two of the nobles who performed for the court in 'Hymen', a masque written by Ben Jonson. In 1609, his name appears on the Second Charter of Virginia dated 23 May 1609. As investor and on the council. In 1613, he was accused of political disaffection and imprisoned in the Marshalsea Prison, but was soon released and seems not to have remained in disfavour for long since he not only retained his offices but in 1615 obtained a monopoly on the manufacture of glass. He established glass factories in various places, including the first at Newcastle, pioneering the use of sea coal rather than wood in the manufacturing process, and there are records of his later defence of his patents in parliamentary debates. He also acquired the Vauxhall glassworks in Lambeth and glass factories in Woolwich, where he also managed the dockyard and the ropeyard, close to his home in East-Greenwich. In 1618, Mansel was appointed Vice-Admiral of England in 1618, and ceased to be Treasurer of the Navy. Contemporary papers suggest was not in fact intended as a promotion, and that he was deliberately moved to a less influential position because of suspicions of his dishonest administration as treasurer. Nevertheless, he apparently retained royal favour, even after the failure of the expedition he led against the pirates of Algiers in 1621. In 1620, his name appears on the Charter of New England 3 November 1620. As investor and on the council.
