P. H. Ditchfield, The Cathedrals of Great Britain…
“ We pass to the north aisle of the choir and proceed to the ambulatory, processional path, or retro-choir. Here, at the back of the altar, was the chief shrine, where the relics of some great saint were preserved under a gorgeous cover decorated with gold and silver and precious jewels, to which crowds of pilgrims flocked, and there prayed and gazed upon the wondrous shrine, and made their offerings. The steps and pavement leading to the shrine often still show by their worn condition the evidence of the tread of countless numbers of pilgrims. ”
