The evidence relating to this MP’s career is sketchy and unsatisfactory.
Parker was not the only MP for Portsmouth in our period to have links with the Isle of Wight, as is clear from the career of John Garston*, who represented the borough in 1429. His own continued concern with the affairs of the island’s inhabitants is indicated by his association with the former shire knight John Lisle I* of Wootton in transactions regarding the manor and advowson of Mottistone there in July 1426, just after the dissolution of his Parliament. Interestingly, Garston’s son-in-law John Roucle was a beneficiary of the settlements.
In 1431 Parker had appeared as a juror at Winchester for the collection of subsidies from the Hampshire hundreds of Fordingbridge, Titchfield, Sutton and Andover, and he was among the men of the county required in 1434 to take the generally administered oath not to harbour malefactors.
