Though we, in this part, are following up the history of the cathedral structure, yet it may be interesting to note that it was during the episcopate of Bishop Eborard that the boy saint, St. William of Norwich, was said to have been martyred. He was the son of country folk who gained a living by agriculture. During his life he worked many miracles, and by his death gave Norwich a share of his glory. It is related that he was tortured by the Jews, and on the spot where they were discovered secretly burying him, in Thorpe Wood, a chapel was erected called the Chapel of St. William in the Wood. Very little now remains of this structure, but the site can still be traced. The altar before referred to was set up to his memory in Norwich Cathedral, on the north side of the screen leading into the ante-choir.

Bishop Eborard resigned the see, or was deposed in 1145, and retired to the abbey of Fontenay, Mont-Bard, Côte d'Or, in the South of France. He had re-enforced a mandate of Herbert's that the clergy of the diocese should contribute to the fund in aid of the fabric.

During the episcopate of Eborard's successor, Bishop William de Turbe, the cathedral appears neither to have gained or suffered until, about 1169 or 1170, a fire broke out in the monastic buildings; the fire-extinguishing appliances in those days, if indeed there were any at all, could not prevent it spreading to the cathedral. It is generally believed that the original Norman Lady Chapel was also well destroyed.

Bishop William de Turbe, although an old man at the time (he died in 1174), is said to have taken a vow that he would not go from within twelve leucas of the cathedral, unless compelled by the direst necessity, until the ravages of the flames had been repaired. He is reported to have seated himself at the door of the cathedral, and to have begged alms for this purpose from the worshippers. The work of reparation was carried on by his successor, John of Oxford, who may also be said to have completely finished Herbert's cathedral. He provided the furniture of the church, the vestments, books and ornaments, and, probably, entirely re-modelled the monastic buildings. He is also said to have built the Infirmary, of which now only three piers remain, to the south of the cloisters.

In the years following, various works were doubtless carried on, but it is not until the time of Walter de Suffield, about 1250, that anything important in the way of structural alteration was effected. The fire of 1169 had in part or whole destroyed the original Norman Lady Chapel, and Bishop de Turbe had restored the same in some measure. But the cultus of the Blessed Virgin in the interval had gathered strength wonderfully; chapels dedicated to her naturally became important, and Bishop Suffield determined to pull down the old Norman work and rebuild a chapel in the Early English style then prevalent. Dean Goulburn, in his work on the cathedral, estimated the size of the later chapel at 90 feet long by 30 feet wide, and these dimensions are shown plotted in dotted lines on the plan in this book. This is longer and narrower than the size given in previous conjectures, but Dean Goulburn had the opportunity of inspecting the foundations of the chapel, which, with those of the still earlier one, lie buried but a few feet below the surface in a garden to the east of the cathedral. In the same place, and over the entrance arches remaining, the height and lines of the later roof can be seen still plainly marked on the stonework. These entrance arches are beautifully moulded and decorated on the inside with the "dog-tooth" ornament—a decoration peculiar to the Early English style.

The theological reaction which followed close on this movement led to the neglect of the chapel, and obviated the necessity of maintaining it as a place of worship. It had probably greatly decayed; that Dean Gardiner (1573-89), no longer needing it for services, was tempted to pull it down, as a cheaper expedient than keeping it in repair.

In 1271 Norwich was visited by a terrific thunderstorm, when the tower was struck by lightning. The damage, however, was not great, as, fortunately, the excessive rains which followed quenched the fire that had been kindled. This incident, however, was the precursor of one of the stormiest periods in the history of the city and its cathedral church. Roger de Skerning occupied the episcopal chair, and the prior was one William de Brunham, a man of fierce and truculent disposition. An outbreak of hostilities between the citizens on the one hand and the monks on the other, was brought about by his arbitrary assumption of power; the bishop throughout, ostensibly preferring the safer game of a somewhat anomalous position of neutrality, is nevertheless believed to have covertly sanctioned his proceedings.

A fair was held in Tombland—to the west of the precincts—annually on Trinity Sunday, and by right of ancient custom the priors reaped large revenues by the imposition of tolls on the sales. Tombland, derived from Tomeland, a vacant space, had originally formed part of the estate bequeathed by Herbert, the founder, to the monks; the boundaries in course of time had become matters of controversy, and it is probable that the citizens felt the imposition of these tolls and dues to be a real and serious grievance. A riot broke out and the monks were driven within their gates. Had the prior at this juncture chosen to act peacefully, it is probable that history would contain no record of the sacrilege that followed. He, however, decided to resist force by force, and carefully generaled his monks, disposing them at the various strategic points of his domain. At the same time he sent to Yarmouth for mercenaries—these arrived and the tables were turned; the prior's forces sallied forth from the gates and robbed and pillaged the town.

The citizens, roused to a pitch of madness, drove them and the soldiers back again within the walls of the monastery; the bishop, instead of acting as peacemaker, appears to have preserved his position of neutrality and quietly stopped in his palace. There was a short interval of truce, but it only served as a breath to fan the flames; the citizens besieged the cathedral precincts, and by the means probably of slings succeeded in hurling combustible materials into the buildings, with a result that the whole of the monastery and the cathedral itself was soon in flames. It seems to be an established fact that the prior had placed men in the tower to shoot at the citizens, and it is conjectured that they, and not the citizens, were the cause of the outbreak here.

The only part of the cathedral that escaped was the Lady Chapel; the rest was gutted, vestments and ornaments were carried off, and the monks for the most part slain.