On the north side of the ridge of the Whin Sill, on which sits Hadrian’s Wall, there is an area of marshland called Fogy Moss, which in the Middle Ages housed the castle of Sewingshields. All that remains today is an island of firm ground which rises from the marsh. An Arthurian legend is associated with the castle and indeed there are many Arthurian associations in the Wall country. Some worth mentioning are, King and Queen’s Crags, King Arthur’s Well (at Walltown) and Kind Arthur’s Chair on nearby Sewingshields Crags.