Henry Conyngham was descended from a younger branch of the Cunninghams, earls of Glencairn, settled in Ireland since the early seventeenth century. In 1738 he succeeded his brother to the family property in Ireland worth £6,400 a year,
upon the strength of having fought the battle the last Parliament he was promised to be brought in for Sandwich upon a compromise if it could be obtained, that is effected and he not the person. Then as to Marlow, he is not to be chosen there, but that I think is in great measure his own fault ... and lastly I own ... there was a sort of promise to bring him in somewhere or other ... My acquaintance with the man was merely accidental by my father’s being lord lieutenant and I have no further partiality for him but that I think if he was in Parliament he would act steadily.
Devonshire mss.
In the end a seat was found for him at Tiverton. The 2nd Lord Egmont, in his electoral survey of c.1749-50, noted against Marlow:
Conyngham, who stood there formerly upon the ministerial interest, might notwithstanding be a proper man. He has been slighted and ill-used by them and grumbles. But he must have some douceur in the military way. He is not a very wise man and is apt to be out of humour, but I believe manageable by a minister without much trouble.
He died 3 Apr. 1781.
