It is not known whether Westeby was a native of Wiltshire, or how he came into possession of lands and tenements at Yatesbury, in the north of the county.
Westeby took part in the conduct of civic affairs, occasionally attending convocations held in the ten years from February 1429.
Why Westeby, rather than a prominent merchant of Salisbury and member of the city council of 24, was elected to the Parliament assembled on 21 Jan. 1437 is difficult to explain. He was not the citizens’ first choice, for at the election held on 7 Dec. previously (which he himself had attended), the names of three candidates (Robert Okebourne, John White and William Ludlow II*) had been put forward, but all were rejected: the convocation found him and William Pakyn* more acceptable. Like him, Pakyn was a ‘gentleman’ and administrator – indeed, he was currently purveyor of the King’s works at Clarendon – yet unlike him he was a member of the 24 and a former mayor. Nor was this Pakyn’s first time in the Commons. A civic assembly held in November 1422 had decreed that henceforth Salisbury would elect to Parliament ‘one old man and one young one’, and perhaps Pakyn and Westeby fulfilled this criteria by being comparatively experienced and inexperienced in civic affairs (even though the latter cannot have been particularly youthful). The writ issued at the close of the Parliament (on 27 Mar.) authorized payment to them for 72 days’ service at the rate of 2s. a day, which amounted to £7 4s. each.
Westeby died before Hilary term 1442. His executors, Gregory and William Westeby, both described as gentlemen of ‘Uptefont’(?Urchfont), were then sued in the common pleas by John Norris* and John Uffenham* for unjustly withholding the sum of £10 from his estate, but they themselves brought other suits against our MP’s debtors.
