No election indenture survives for Dunwich in 1628, and the fragmentary record of the admission to the freedom of the successful candidate in the corporation records gives only the surname Winterton. However, the Crown Office list records that the Member was Francis Winterton, while Sir John Rous I*, who unsuccessfully contested the election, described him as ‘a servant to the Lady Denbigh’.
Winterton came from a minor Leicestershire family resident at Wibtoft, a township in the parish of Claybrook, by the Elizabethan period.
Winterton had no known connections with Suffolk and probably owed his election to the borough’s desire to ingratiate itself with Buckingham, the lord admiral, who they were soon to petition to exempt their seamen from service in the Navy. He only appears once in the surviving records of third Caroline Parliament. This was on 2 Mar. 1629, the tumultuous last day of the Parliament, when he was the only Member known to have made any serious attempt to release the Speaker, who was held down in his chair by the allies of Sir John Eliot. According to the interrogatories subsequently drawn up the attorney-general, (Sir) Robert Heath*, William Coryton had to use ‘some violence’ to restrain him,
On 20 May 1629 the king let it be known that he intended to confer £9,800 on Winterton and Ralph Boteler, a kinsman of the countess of Denbigh, ‘for special service best known to His Majesty’, and as a result the two men were granted the arrears of the wine licences since 1616.
