William followed the lead of his brother John by seeking their fortunes in the south of England, far from their Yorkshire roots. John, who swiftly established himself in Kent at the turn of the century, benefited from a close and lifelong attachment to Ralph Neville, earl of Westmorland, whose brother Lord Furnival appointed him his under treasurer of the Exchequer in 1404,
While employed at the Exchequer as clerk of the receipt William took advantage of his position to gain the post of joint alnager in London for a two-year term, and from October 1415 he shared the farm of properties in Surrey said to have belonged to the recently-deceased treasurer, the earl of Arundel.
Indeed, several years earlier he had begun to establish links with the gentry of Wiltshire, and it was there that he chose to settle. His first recorded links with Wiltshire came in 1410 when he stood surety at the Exchequer for the farmers of a moiety of the de la Roches estates during the minority of John Baynton*,
To this inheritance the Darells made additions by purchasing many other properties in Wiltshire and Berkshire (such as the manor of Thrup in Ramsbury and a lease of another in Kintbury), while consolidating their holdings elsewhere.
The process of accumulation of these widespread estates was yet continuing when Darrell made a final concord in 1428. By this his very substantial holdings in five counties were settled on him and his wife in tail male, with remainder to his own issue, to John his brother and his male issue, and finally to William Fynderne and his wife (Elizabeth Darell’s aunt) and their son Thomas Fynderne* for life.
Darell’s rise to prominence in Wiltshire may be readily charted from his appointments to royal commissions in the county from 1419, and highlighted by his being pricked as sheriff in November 1420. Furthermore, and most unusually, he was kept on in the post for three consecutive years, contrary to the statutes which strictly limited tenure of a shrievalty to one year at a time. No explanation for this extraordinary state of affairs has been found, nor, conversely, any suggestion that Darell’s successive appointments aroused criticism or local opposition. Given his record of office-holding over the years there can be little doubt that he proved himself to be a competent and able administrator. Shortly after his initial nomination as sheriff of Wiltshire he appeared in Chancery with three other members of the shire gentry to offer mainprise under £200 that they would answer for the issues of the temporalities of Amesbury priory during the vacancy.
This influential position was bolstered by Darell’s close links with one of the leading landowners of Wiltshire, Sir Walter Hungerford, later Lord Hungerford, the distinguished diplomat and soldier. Their association dated at least from 1415 (when Hungerford had witnessed the settlement Darell and his wife received from her father),
Darell had been returned for Wiltshire to this Parliament, which assembled on 13 Oct. 1427, and while in the Commons he no doubt assisted his master Hungerford by preparing the summaries of Exchequer records to demonstrate the financial state of the realm for presentation to the Lords. While the Parliament was in session he was reappointed sheriff of Wiltshire, so it must be assumed either that he neglected his shrieval duties at least some of the time, or else was occasionally absent from the Lower House. Darell was expected to convey personal messages from the treasurer to other members of the royal council: thus in February 1429 he took letters from Farleigh Hungerford to the duke of Gloucester at Greenwich and to the archbishop of York (the chancellor) at Waltham; and he also delivered messages to the duke of Orléans, a prisoner in Bolingbroke castle in Lincolnshire. In this respect he should be seen as more than a mere messenger: he would have been expected to clarify Hungerford’s views to the recipients. Darell’s position brought him into regular contact with other leading figures at the Exchequer. In April that year he stood surety for two of the barons, and in November he was appointed with Thomas Brown II* to search the cargoes of two Venetian galleys berthed in the port of London for contraband.
Darell’s second election to Parliament, early in January 1431, took place while he was still acting as Hungerford’s deputy at the Exchequer and at a time when the treasurer still had special powers during the King’s absence in France. He was returned with John Baynton, a fellow member of Hungerford’s circle, and during the parliamentary session he was paid expenses with another of their number, Robert Long*, incurred while the two of them had been conducting inquiries into customs’ offences in Southampton.
Darell continued to be active in local government. At the end of the parliamentary session he was appointed to the Wiltshire bench, and later that year he was made sheriff of Oxfordshire and Berkshire. He also continued to take an interest in the Crown’s finances, making a further personal loan, this time of 100 marks, in April 1434, and yet another, of £40, in July 1435. In addition, he and his brother John were both put down for loans of £40 in February 1436 to help finance the army about to be sent over to France. He served on the loan commission in Wiltshire in March 1439.
In the course of his career Darell had come into contact with prominent figures both in the city of London, such as the mercer William Estfield*, and in the localities, such as Robert Andrew*, Robert Long and William Danvers*, for all of whom he agreed to act as a feoffee.
Family matters also preoccupied him. His brother John died in October 1438, having named him as an executor and allotted him a remainder interest in certain of his estates, settled in tail-male on his three sons. The executors were instructed to sell property in the London parish of St. John the Baptist, Walbrook, for the benefit of John’s soul, and in the following year William released to his oldest nephew and namesake land pertaining to the young man’s maternal inheritance.
Yet, save for his sporadic service on the Wiltshire bench, Darell took little part in local government in the 1440s. Furthermore he ceased to be an intimate member of the circle of Lord Hungerford, who did not mention him in his will of 1449.
In accordance with their status, all three of Darell’s daughters married heirs to substantial estates. Before his death Jane had been matched with John Wroughton*, who represented Wiltshire in the Parliament of 1455;
Darell’s heir George, by then aged over 30,
