Ellis Peters' introduction to the murderous medieval world of brother cadfael. In the remote welsh mountain village of gwytherin lies the grave of saint winifred. Now, in 1137, the ambitious head of shrewsbury abbey has ...Ellis Peters' introduction to the murderous medieval world of brother cadfael. In the remote welsh mountain village of gwytherin lies the grave of saint winifred. Now, in 1137, the ambitious head of shrewsbury abbey has decided to acquire the sacred remains for his benedictine order.