It is recorded that in 1136 the bridge was burnt, which may perhaps merely mean that the deck was destroyed, whilst the piers remained sufficiently uninjured to allow of the structure being repaired; but in 1163 it had become so dangerous that Peter of Colechurch undertook the erection of a new bridge, which he constructed of elm timber. This sudden emergence of Peter from obscurity to carry out so important an engineering work is as dramatic as is that of St. Bénezet, who founded the confraternity of _Hospitaliers pontifices_, which undertook the building of bridges and the establishment of ferries. According to legend, this saint, although then only a young shepherd, essayed to bridge the Rhone at Avignon, and the ruined arches of his great work are still among the sights of that city. Peter may have possessed many more qualifications for building than a shepherd could have acquired, as large ecclesiastical works were in progress in London throughout his life, which he must have observed and perhaps profited by; but this is only surmise, as of his history, except in connection with his great work, we know no more than the fact that he was the chaplain of St. Mary Colechurch. His contemporary, Randulphus de Decito, Dean of London, says that he was a native of the city, so that it is scarcely likely that he had acquired his skill abroad; but we are told that he traversed the country to collect the moneys for his undertaking, and he may thus have obtained some knowledge of the many Roman bridges which still survived, or even have seen the great bridge which Bishop Flambard had recently erected across the Wear at Durham. His selection as the architect of the earlier bridge of 1163 may perhaps not be due in any way to his especial engineering skill, but rather to some intimate connection with the priory of St. Mary Overie, whose canons were primarily responsible for the bridge repairs; indeed, since he is merely described as the chaplain of his church, he may himself have been one of the canons. But be the cause what it may--and it was not his success in erecting this first bridge, for it soon became dilapidated--thirteen years after its erection he started afresh, on a site further up the river, to erect a bridge of stone. In 1176, two years before St. Bénezet began his great bridge at Avignon, he commenced his work, and thirty-three years passed before its completion. Whether the delay was due to lack of funds or the incapacity of the architect we do not know, though probably to both, for before Peter's death King John, who had manifested considerable interest in the new bridge, had urged Peter's dismissal, and, under the advice of the Archbishop of Canterbury, suggested the appointment of Isembert of Saintes to complete the work. This Isembert was credited with the erection of the great bridge across the Charante at Saintes, although that bridge was undoubtedly a Roman one, and all he appears to have done was to turn arches between the original piers, and make it a stone bridge throughout. The same master was said to have built another bridge at La Rochelle, and had evidently gained much experience in such engineering work; and it is perhaps a misfortune that the King's advice was neglected, as a skilled architect, which Peter certainly was not, might have saved the city of London much eventual loss and trouble. Peter was, however, suffered to continue the bridge until his death in 1205, when a commission of three city merchants completed the work in four years.