The manor of Henley in Crewkerne had come by the late fourteenth century to a junior branch of the family of Montagu which was related to the earls of Salisbury of that name, but precisely how is unclear.
In that county, Montagu twice attested the parliamentary elections held at Ilchester in the 1440s. He was patron of the Somerset churches of Weston Bampfylde (from 1444) and Sutton Mountagu (from 1449);
It is this link with the earl of Wiltshire which provides the key to Montagu’s election to the Parliament of November 1449 for the Dorset borough of Weymouth. The borough returned others of the earl’s affinity in this period: his henchman Henry Filongley* from Warwickshire had represented Weymouth in the previous Parliament, earlier that same year, and Filongley’s nephew Thomas Froxmere*, who came from Worcestershire, was to do likewise in 1453. Furthermore, Montagu’s fellow MP, John Russell III* (unlike the others a local man), had only a short while before been married to Filongley’s kinswoman Alice Froxmere. Montagu was closely enough linked to the earl as to become involved in his quarrel with Sir Edward Brooke*, Lord Cobham, which caused a serious break-down of order on the border of Devon and Dorset in the winter of 1450-1, with hundreds of their followers allegedly up in arms. Although Montagu’s own part in the eruption of violence is not well documented, in the Trinity term of 1451 both he and a namesake were listed in association with Filongley and Robert Cappes, another of the earl’s most prominent retainers in Dorset and Cobham’s chief opponent, as defendants in a suit brought by Cobham in the King’s bench. One of the William Montagus so listed was called ‘formerly of Sloo, Somerset, esquire’, and the other ‘formerly of Hooke, Dorset, esquire’, the latter place, Hooke in west Dorset, being the earl of Wiltshire’s adopted seat in the county.
The relationship between these two Williams is now hard to determine, but it seems likely that they were father and son; indeed, our MP appears to have had two sons who shared his name. Deciding which of the later records relate to William the MP becomes problematic. Probably it was he who in Hilary term 1454 sued Joan, widow of Robert Hill I*, on a plea of trespass,
The execution of the earl of Wiltshire by the Yorkists in 1461 seems not to have affected Montagu adversely. He was listed as a potential juror at sessions of oyer and terminer at Dorchester on 31 May 1462 (though not pricked in the event); and served on the jury at the post mortem for William, Lord Botreaux, conducted at Sherborne that July.
It may be the case that the Montagus welcomed the Readeption of Henry VI, although firm evidence for this is lacking. Following Edward IV’s triumphant return to his throne in 1471 two William Montagus saw fit to purchase royal pardons: William Montagu, ‘late of Henley, esquire’, did so on 23 Nov. 1471, and William Montagu ‘of Sloo, Somerset, gentleman’, on 20 Feb. 1472 (although it is always possible that this was the same man).
As these snippets of information imply, in the late 1470s and 1480s it becomes increasingly difficult to disentangle the lives of the different William Montagus. However, one way of interpreting the evidence is that our MP was the William Montagu of Sloo, esquire, who was patron of the church of Weston Bampfylde in 1476 and 1478,
If this interpretation is correct, our MP was the esquire who died on 17 June 1489, leaving as his heir his grandson Robert (the son of William and Katherine, who was said to be aged 15). He had held substantial estates in Somerset, including the manors of Sutton Mountagu and Sloo. The former, Sutton Mountagu, he had settled on his wife Alice, a twice-widowed woman of advanced age, at the time of their betrothal. He had also given one of her sons, John Pyke the younger, an annuity of £2 for life.
