Having shown that the Celtic conception of episcopal jurisdiction was definitely monastic, as opposed to the Roman which, at an early period, had become diocesan, it is necessary to fix approximately the date at which, in Cornwall, the former gave place to the latter. Upon the solution of the problem depends the character to be assigned to the four Celtic bishops, Kenstec, Conan, Daniel and Comoere, whose names are disclosed in certain authentic documents and are given in the Truro Diocesan Kalendar. In Brittany, a more progressive country and less isolated than Cornwall, the change was violently effected by the patriot Nominoë in the year 849. In Ireland the diocesan system was not adopted until 1152.[55] Wales submitted to the jurisdiction and discipline of Canterbury in 1207. It is certain, therefore, that Cornwall, more opposed to Saxon influence than any of the others, did not accept the diocesan system until the days of Egbert (836). There is good reason to believe that the change took place much later. Kenstec’s letter to Archbishop Ceolnoth (833-870) states explicitly that his bishopric was monastic (_Ego Kenstec_ ... [ad] _episcopalem sedem in gente Cornubia in monasterio quod lingua Brettonum appellatur Dinuurin electus, etc._).[56] The next bit of historical evidence is that of Asser, the adviser of King Alfred, to whom Alfred in 884 committed Exeter _cum omni parochia quae ad se pertinebat in Saxonia et in Cornubia_.[57] The precise nature of the commission is uncertain. If the gift was made after Asser became bishop of Sherborne it probably involved the oversight of Devon and of that portion of Trigg, in Cornwall, where Alfred’s possessions were situated. There is nothing to lead us to conclude that the Celtic Christianity of Cornwall was to be affected by it. A very distinct advance, in intention if not in achievement, was made when, in 909, Archbishop Plegmund constituted the see of Crediton. To Eadulf the bishop were given three vills in Cornwall,—“Pollton, Coelling and Landuuithan from which year by year he might visit the Cornish people in order to extirpate their errors. For in times past, as far as possible, they resisted the truth and were not obedient to the apostolical decrees.” Pollton and Landuuithan are unquestionably Pawton in St. Breock and Lawhitton. Coelling presents some difficulty because Domesday Book and all subsequent records represent Callington (with which it has been identified) as ancient demesne of the Crown. It is possible, however, that before the Norman Conquest Coelling may have been surrendered to the King or have been exchanged for another holding.[58] How far Eadulf was successful it is again impossible to say. A conquered race does not readily surrender its traditional religious customs. One of the most instructive records of the Jewish captivity is that which preserves the pedigrees of the priests who were themselves to preserve and perpetuate the priestly succession.[59]