St Tewdrig Well, holy well at Mathern, Monmouthshire. According to tradition, Tewdrig abdicated and became a hermit at Tintern. However, he later came to his son Meurig's assistance, and they repelled the invading English in a battle at Pont y Saeson (Bridge of the Saxons). Unfortunately, Tewdrig was wounded. His wounds were washed at a spring, now called St.Tewdric's Well, where he died. A church was erected on the site of his burial (Mathern), and he was revered as a saint. There are theories that Meurig's son, Athrwys, is 'the real' King Arthur. Credit: Janet & Colin Bord/Fortean Picture Library / Topfoto