Jenison was of an old family of Newcastle merchants, and was politically connected with Charles, 2nd Earl of Tankerville. Possibly he owed his introduction to the Isle of Wight to Tankerville, whose brother-in-law and friend, Lord Portsmouth, was its governor in 1749. There he became the intermediary between the Pelhams and Thomas Holmes, their manager for the Isle of Wight boroughs; was in his confidence and usually collected for him the secret service subsidy he had for those boroughs, and which Holmes kept a secret from his brothers, their Members. About his own seat at Newport, Jenison wrote to Pelham on 18 Feb. 1754:
biography text
Volume
Parlimentarian
Parliamentarian
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