Froissart, speaking of the English court at this period, says, "At this time reigned a priest called William of Wykeham. This William of Wykeham was so much in favour with the King of England, that everything was done by him, and nothing was done without him."

Upon the death of William de Edyngton, on the 8th of October, 1366, Wykeham was immediately, upon the king's earnest recommendation, elected by the prior and convent of Winchester to succeed him as bishop of that see. He was not consecrated till the 10th of October in the year following; but this delay, till an adjustment was effected of the conflicting pretensions of the royal authority and the court of Rome, was evidently occasioned, as Lowth has shown, only by a contention between the king and the pope as to which of them should have the largest share in Wykeham's promotion. Meanwhile he had been appointed by the king lord high chancellor of England; he was confirmed in that office on the 17th of September, 1367.

He continued chancellor till the 14th of March, 1371, when he delivered back to the king both the great and the privy seals, on the change of ministry made in compliance with a petition presented shortly before by the Lords and Commons, complaining of the mischiefs which had resulted from the government of the kingdom having for a long time been in the hands of men of the church, and praying that secular men only might be appointed to the principal offices both in the king's courts and household. There is no appearance, however, of this complaint being specially directed against any part of the conduct of the Bishop of Winchester, who assisted at the ceremony of constituting his successor in the chancellorship, and seems to have for years after this continued to retain both the favour of the king and the goodwill of the parliament, and even to have remained in habits of intimate and confidential connexion with the Duke of Lancaster, to whose influence the removal of the clergy from the offices of state is said to have been owing.

With reference to the complaint that men of the church filled high civil offices, Lowth observes, "The truth of the matter seems to be, that the laity in general looked with an evil eye upon the clergy, who had of late filled for the most part the great posts of honour and profit in the state; which, as it was obvious to remark, neither lay within their province nor were suitable to their function and character. The practice, however improper in itself and liable to objection, yet seems to have taken its rise from the necessity of the times: the men of abilities had for a long time been chiefly employed abroad in the wars; this was the most open road to riches and honours, and every one was pushing forward in it. Besides, it was not at any time easy to find among the laity persons properly qualified, in point of knowledge and letters, to fill with sufficiency some of the highest offices. We see the king was now obliged to have recourse to the lawyers: they gave as little satisfaction as the churchmen had done; and in a few years it was found necessary to discharge them, and to call in the churchmen again."

At the period of Wykeham's election to the see of Winchester, the bishops of that diocese had no fewer than twelve different castles or palaces, all furnished and maintained as places of residence. Wykeham's first undertaking after he found himself in possession of the see was to set about a thorough repair of these episcopal houses.

To these palaces or castles the bishops of Winchester resorted in turns, "living, according to the custom of those times, chiefly upon the produce of their own estates. So great a demand as the bishop had upon his predecessor's executors for dilapidations could not very soon or very easily be brought to an accommodation; however, the account was at last settled between them without proceeding on either side to an action at law. In the first place they delivered to him the standing stock of the bishopric due to him by right and custom: namely, 127 draught-horses, 1556 head of black cattle, 3876 weathers, 4777 ewes, 3521 lambs: and afterwards for dilapidations, in cattle, corn, and other goods, to the value of 1662l. 10s. sterling."

Before his repairs were accomplished, Wykeham had disbursed twenty thousand marks of his own revenue. This energetic improver also applied himself with great zeal and diligence to the reformation of abuses in the monasteries and religious houses of all sorts throughout his diocese. The ancient hospital of St. Cross, at Sparkeford, near Winchester, founded in 1132 by the famous Bishop Henry de Blois, brother to King Stephen, in particular engaged much of his attention, and the objects of the charity were indebted to his persevering exertions for the restoration of many rights and benefits which they had originally enjoyed, but of which they had been for a long time defrauded.

In 1373 a school at Winchester, founded wholly by the munificence of this high-minded prelate, was first opened. The history of the endowment and completion of Winchester College, and of New College at Oxford, for which Winchester is preparatory, is so well told by Lowth, that we transcribe his narrative and just remarks without abridgment:—

"At the same time that Wykeham was thus engaged in the reformation of these charitable institutions, he was forming the plan of a much more noble and extensive foundation of his own, and taking his measures for putting it in execution. He had long resolved to dispose of the wealth which the Divine Providence had so abundantly bestowed upon him to some charitable use and for the public good, but was greatly embarrassed when he came to fix his choice upon some design that was like to prove most beneficial, and least liable to abuse. He tells us himself that upon this occasion he diligently examined and considered the various rules of the religious orders, and compared with them the lives of their several professors; but was obliged with grief to declare that he could not anywhere find that the ordinances of their founders, according to their true design and intention, were at present observed by any of them. This reflection affected him greatly, and inclined him to take the resolution of distributing his riches to the poor with his own hands, rather than employ them in establishing an institution which might become a snare and an occasion of guilt to those for whose benefit it should be designed. After much deliberation and devout invocation of the Divine assistance, considering how greatly the number of the clergy had been of late reduced by continual wars and frequent pestilences, he determined at last to endeavour to remedy, as far as he was able, this desolation of the church, by relieving poor scholars in their clerical education; and to establish two colleges of students, for the honour of God and increase of his worship, for the support and exaltation of the Christian faith, and for the improvement of the liberal arts and sciences; hoping and trusting that men of letters and various knowledge, and bred up in the fear of God, would see more clearly and attend more strictly to the obligation lying upon them to observe the rules and directions which he should give them. Wykeham seems to have come to this resolution, and in some measure to have formed in his mind his general plan, as early as his becoming Bishop of Winchester; for we find that in little more than two years after, he had made purchases of several parcels of ground in the city of Oxford, which make the chief part of the site of his college there. His college of Winchester, intended as a nursery for that of Oxford, was part of his original plan; for as early as the year 1373, before he proceeded any further in his design for the latter, he established a school at Winchester, of the same kind with the former, and for the same purpose. He agreed with Richard de Herton, that for ten years, beginning from Michaelmas of the year above mentioned, he should diligently instruct in grammatical learning as many poor scholars as the bishop should send to him, and no others without his leave; that the bishop should provide and allow him a proper assistant; and that Herton, in case of his own illness or necessary absence, should substitute a proper master to supply his place.

"Wykeham's munificence proceeded always from a constant generous principle, a true spirit of liberality. It was not owing to a casual impulse or a sudden emotion, but was the effect of mature deliberation and prudent choice. His enjoyment of riches consisted in employing them in acts of beneficence, and while they were increasing upon him, he was continually devising proper means of disposing of them for the good of the public, not delaying it till the time of his death, when he could keep them no longer, nor leaving to the care of others what he could better execute himself; but forming his good designs early, and, as soon as he had the ability, putting them in execution, that he might have the satisfaction of seeing the beneficial effects of them, and that by constant observation and due experience he might from time to time improve and perfect them, so as to render them yet more beneficial."