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.