Porter was a London merchant, linked with the Pelhams through his brother-in-law, Claudius Amyand, at one time under-secretary to Newcastle as secretary of state. Porter was also a friend of James West, and it was through West that he came to stand at Evesham.
Porter died 11 Apr. 1756. His widow was granted an annual payment of £500 from the profits made on remitting the subsidy to Russia, ‘in consideration of the late Alderman’s great expenses in the public service’.
