Lord Henry Beauclerk, was born on 11 August 1701, the fourth son, and fifth child of Charles Beauclerk, 1st Duke of St Albans, and his wife Lady Diana de Vere, and grandson of Charles II Stuart, King of England & Scotland.
Like many younger sons of the English nobility, he entered the military and was appointed Ensign of the 1st Foot Guards in 1717. Successive promotions were as Captain in 3rd Foot in 1727; Captain and Lieutenant-Colonel of 1st Foot Guards 1735; Colonel 48th Foot 1743-1745; Colonel 31st Foot 25 April 1745 until his resignation 8 May 1749.
Apparently it was the enmity of Prince William, Duke of Cumberland, that forced his resignation. Four years earlier Lord Henry had voted for acquittal in a court martial, and couldn't be persuaded to change his vote by the Duke, who wanted the man condemned.
He was also a Member of Parliament in Plymouth 26 November 1740 - 1741, and in the constituency of Thetford in Norfolk from 29 December 1741. He voted almost consistently with the Government.
Although he married a heiress (see below) who inherited the manors of Leckhampstead and Heyborne Fields in Buckinghamshire, they were never wealthy, particularly after Henry resigned his commission. Consequently both Henry and his wife, were constantly seeking to influence to gain a place at court or other position. Eventually Henry and his brother Lord George Beauclerk, shared in a pension of 800 pounds per annum on the Irish establishment.
He married 24 or 25 June 1739, Hon. Martha Lovelace, daughter of John Lovelace, 4th Baron Lovelace of Hurley, and his wife, Charlotte Clayton, and sister and heir of her brother Nevill Lovelace, 6th Baron Lovelace of Hurley (died 28 July 1736).
They had eight children:
Lord Henry Beauclerk, died on 6 January 1761, and was buried on 11 January at Whitchurch, near Edgeware.
After his death his widow continued to try to gain support for herself and her children, and was granted the 400 pounds per annum on the Irish establishment her husband had received. She also sought to further her son's career in the Church.
His wife, died 5 March 1788 in London, and was buried at Stanmore in Middlesex. Her son received the manor of Leckhampstead on her death, but she left old South Sea Company annuities worth L1050 to be divided equally between her unmarried daughters,
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