sentences:  His younger son, the fourth Baronet, sat as Member of Parliament for Aylesbury and for St Mawes and served under William Pitt the Younger as Under-Secretary of State for the Home Department.In 1789 he assumed by Royal licence the additional surname of Tyringham and in 1811 the surname of Morland in lieu of Tyringham.His younger son, the sixth Baronet, also represented Aylesbury in the House of Commons.