Stafford Jerningham could trace his ancestry back to Hubert Gernegan, who held the knight’s fee of the Suffolk honour of Eye in 1183. The Costessey branch of the family was founded in the sixteenth century by Sir Henry Jerningham, captain of Queen Mary’s guard on the death of Edward VI, who received several grants of manors from her, including Costessey, which he made his principal residence. He and his descendants remained loyal to their Catholic faith. In June 1824 Stafford Jerningham’s father finally secured the reversal of the attainder on the barony of Stafford, which had been in place since 1680, and successfully claimed the title, 6 July 1825; he became the 2nd baron and assumed the name of Stafford before Jerningham, 5 Oct. 1826. Stafford Jerningham, who his mother remarked in 1821 ‘represents to the life the truth of Lord Normanby’s* speech for the Catholics’, and who seemed ‘desoeuvre and humble, though with talent and judgement’, undertook a tour in the summer of 1827 which included Belgrade, Budapest and Vienna.
The duke of Wellington’s ministry listed him among the ‘doubtful doubtfuls’, and he voted against them in the crucial division on the civil list, 15 Nov. 1830. He presented anti-slavery petitions from Pontefract, 17 Nov., and Costessey, 16 Dec. 1830. He divided for the second reading of the Grey ministry’s reform bill, 22 Mar., and against Gascoyne’s wrecking amendment, 19 Apr. 1831. He stood again for Pontefract at the ensuing general election, when he explained that while he felt ‘deeply indebted’ to Wellington for ‘that civil and religious liberty’ which had enabled him to enter Parliament, he had come in as ‘an independent man’ and had not hesitated to vote against the duke’s government on the civil list after the latter’s ‘famous declaration against all reform’. He was convinced that ‘the general cry for reform upon the recurrence of distress, and upon the occurrence of disturbances of a revolutionary character in other countries’, was ‘decided proof that the system here had something in it that ought to be cured’. He therefore welcomed the ‘wise, salutary and comprehensive’ reform bill, and stated that it would be his duty to ‘attend on every occasion on which that bill was brought forward, and to give it his most hearty and cordial support’. He reaffirmed his commitment to a general reduction of taxation, and praised ministers for showing that they ‘had the interests of the poor at heart’. He was returned unopposed with an anti-reformer.
Stafford Jerningham was returned for Pontefract at the general election of 1832 and sat as a Liberal until his retirement in 1834. He was one of the prominent Catholics who took the pledge of temperance in September 1843 during the campaign of the Rev. Theobald Matthew, and he signed the address written by Dr. Wiseman in April 1848 calling for the restoration of diplomatic relations between Britain and the Vatican.
