Chapter 18With a pot of tea and slices of bread on the small table, Eira indicated for Edison to help himself. “It’s time I told you of the history we share and the part we play in the defence of these isles.” “Very well.” Edison settled, legs folded beneath him, as Eira stared into the distance. “If you know your history, you’ll remember that in the battle of Tryfrwyd, King Arthur fought a warrior. Garwlwyd, who was also known as Rough-Grey. You may even have known that he and his warriors were known as dog-heads. Arthur defeated Garwlwyd, and because of this, some of the dog-head warriors pledged their allegiance to him.” Edison nodded. “I had heard of that tale, but thought it was just myth and legend.” “Not so, boy. Years later, Arthur fought a darker and more deadly creature. Wit