The population of Pembrokeshire in 1670 has been estimated at around 32,000, making it the fifth largest of the Welsh counties by that measure. By size, however, it was small, its county leaders asserting in 1626 that it was at no point more than 18 miles wide.
It appears that the small freeholders of the county were plentiful in the north, as were the larger ones in the south, although according to Owen the numbers of them overall were in sharp decline in comparison with neighbouring Carmarthenshire: ‘scarce 400 freeholders in the whole shire to serve at the great sessions, quarter sessions and all other trials and services’.
Wogan took the side of Parliament when civil war broke out, and in January 1643 was requesting reinforcements to defend Pembrokeshire against royalist incursions. He was dead before June 1644, however, and no attempt was made to fill the vacancy in the Commons until 5 December 1645, when writs were moved for this election and two other Welsh seats (the writ for Pembrokeshire was issued on 15 January 1646). The same day (5 Dec.), the Commons appointed six high sheriffs, including William Phillips for Pembrokeshire.
Under the terms of the Instrument of Government, Pembrokeshire claimed two county seats, Haverfordwest retained its single seat, and Pembroke Boroughs disappeared as a constituency. The election for the first protectorate Parliament took place on 12 July 1654 and like that of October 1640 was held at Prendergast. Sir Hugh Owen, as sheriff, was returning officer, and at least 48 electors attended the meeting. The place of residence of most of them was recorded on the indenture, and they represented a spread of locations across the county, including the far north. Among the first-named freeholders on the indenture were James Philipps* and Herbert Perrot*.
Sir Erasmus Philipps stood aside in the general election of 1656, as he was serving sheriff. This allowed James Philipps to claim the first seat. He was also successful in Cardiganshire, where he lived. The Pembrokeshire return for 1656 has not survived, but his partner at the election was John Clerke II, a former soldier and an accomplished administrator. Clerke was unfailingly loyal to the Cromwellian interest, and had no prior connections with Pembrokeshire. He probably owed his election there to the patronage of both James Philipps and Colonel Philip Jones*, another Cromwellian dependable. Philipps chose Pembrokeshire, and the vacancy created in Cardiganshire was obligingly filled by Clerke, doubtless at the behest of Philipps. The by-election for Pembrokeshire took place, once again at Prendergast, and the only candidate was the young protectoral courtier, Edward Lawrence, son of Henry Lawrence I*, president of the lord protector’s council. Over 50 electors signed the return, from a wide geographical range of parishes.
Pembrokeshire reverted to being a single seat constituency under the dispensation for the elections to Richard Cromwell’s Parliament. His term as sheriff behind him, Sir Erasmus Philipps of Picton Castle was available for the seat, which he doubtless took without challenge. Arthur Owen appears not to have travelled to Westminster in February 1660 to appear with the other members of the Long Parliament who had been secluded in December 1648, but he was elected as knight of the shire to the Convention in 1660 and again in 1661, without any known opposition. Owen held the seat until his death, lauded as ‘the credit and benefit of his country’ by a contemporary observer of the Pembrokeshire political scene, and admired for his political flexibility.
