The full record of diocesan administration under Bishop Hatfield. This edition completes the publication of the surviving medieval episcopal registers from the diocese of Durham.Thomas Hatfield was a member of the inner circle of Edward III, who advanced him as his candidate for election to the chapter of Durham and for provision to the pope after the death of Richard Bury in April 1345. As a trusted administrator, his choice was no doubt attractive to the king, in part because along with the diocese came the palatinate of Durham. He was involved in the early stages of the war with France and was present at the battle of Crecy. For most of his episcopate, however, he struck a balance between remaining in his diocese and the palatinate most of each year and staying near the centre of national affairs in London. The first wave of the Black Death struck England in June 1348 and spread throughout the country in 1349. The long-term effects can be seen at several points in the register in respect of shortage of priests and declining revenues of religious houses, parish churches, and chantries. Primarily a document of diocesan administration, the register is chiefly composed of the transfer of benefices, but there are ample letters concerned with discipline of the clergy and the laity, and the rare example of a detailed record of a trial, that of an archdeacon of Northumberland for the killing of a layman. This edition completes the publication of the surviving medieval episcopal registers from the diocese of Durham.