sentences:  The best preserved of these are the heads of two canons, each wearing a cowl with the tonsure visible, the head of a woman with shoulder-length hair, parts of a seated figure holding an open book, and a creature that might represent a serpent or an otter.There are numerous fragments dating from the 14th and 15th centuries.These include portions of string courses, tracery, corbels, window jambs, and arch heads.