 Bishop John <unk> ( <unk> – 14 ) contributed greatly to the rebuilding of the cathedral , as evidenced by the inscription on his tomb praising his efforts . When he died , the chapter met secretly — " in <unk> camera <unk> in <unk> <unk> <unk> " — and agreed that should one of their number be elected to the see , the bishop would grant one third of the income of the bishopric annually until the rebuilding was finished . The major alterations to the west front were completed before 1435 and contain the arms of Bishop Columba de Dunbar ( 1422 – 35 ) , and it is presumed that both the north and south aisles of the choir were finished before <unk> , as the south aisle contains the tomb of John de Winchester ( 1435 – 60 ) . Probably the last important rebuilding feature was the major restructuring of the chapterhouse between <unk> and 1501 , which contains the arms of Bishop Andrew Stewart . 
