The Clerk Marshal (also spelled Clerk Martial) was an official of the British Royal Household in the department of the Master of the Horse. From the Restoration the office was held with that of Avenor until the latter post was abolished in 1793. The office of Clerk Marshal was then combined with that of First or Chief Equerry until 1874. From 1841 the holder was a member of the Government, but the office ceased to be a political one from 1866.Chris Cook and Brendan Keith, British Historical Facts 1830–1900, Macmillan 1975, p. 27
The duties of the Clerk Marshal were to swear in the officers of the Master of the Horse's department, and for the payment of all officers and servants. He was also responsible for submitting the accounts of the department to the Board of Green Cloth. Clerks Marshal were appointed in the households of other members of the Royal Family as well.
List of Clerks Marshal
to Charles II 8 June 1660: George Barker 18 August 1660: Richard Mason 10 September 1671: Joseph Cragg
to James II 21 April 1685: Thomas Morley
to William III and Mary II 10 April 1688: William Ryder 12 March 1689: Anthony Rowe 27 April 1694: John Latton
to Anne 23 June 1702: Hugh Chudleigh 6 November 1707: Thomas Lister 12 June 1711: Conyers Darcy
to George I 29 September 1714: Conyers Darcy 10 June 1717: Francis Negus
to George II 20 June 1727: Francis Negus 9 September 1732: vacant 22 April 1734: James Lumley 11 March 1741: Edmund Charles Blomberg 8 November 1757: Courthorpe Clayton
to George III 15 December 1760: Timothy Carr 6 April 1771: Benjamin Carpenter (Chief Equerry from 1 January 1783) 9 March 1788: Philip Goldsworthy 6 January 1801: Robert Manners
to the Prince Regent, later George IV 24 March 1812: Benjamin Bloomfield (knighted 1815) 25 August 1817: Francis Thomas Hammond (knighted 1819)
to William IV 16 July 1830: Sir Andrew Francis Barnard
to Queen Adelaide 2 January 1846: Sir Andrew Francis Barnard
to Queen Victoria 20 July 1837: Henry Frederick Compton Cavendish 10 September 1841: Lord Charles Wellesley 7 July 1846: Lord Alfred Paget 28 February 1852: Charles John Colville, 1st Viscount Colville of Culross 30 December 1852: Lord Alfred Paget 26 February 1858: Lord Colville of Culross 1 July 1859: Lord Alfred Paget (held office until 1892)
to Prince Albert 2 January 1842: William Wemyss 8 March 1853: Alexander Nelson Hood
to Edward VII 1 January 1904: Sir Stanley Calvert Clarke (also Chief Equerry until 9 October 1908)
References