Grim's Ditch, Grim's Dyke (also Grimsdyke or Grimes Dike in derivative names) or Grim's Bank is a name shared by a number of prehistoric bank and ditch linear earthworks across England. They are of different dates and may have had different functions. Purpose The purpose of these earthworks remains a mystery, but as they are too small for military use they may have served to demarcate territory. Some of the Grims Ditches may have had multiple functions. Etymology The name "Grim's Ditch" is Old English in origin. The Anglo-Saxon word dīc was pronounced "deek" in northern England and "deetch" in the south. The method of building this type of earthwork involved digging a trench and forming the upcast soil into a bank alongside it. This practice has resulted in the name dīc being given to either the trench or the bank, and this evolved into two words, ditch and dyke in modern British English. The origin of the name Grim is shrouded in mystery, but there are several theories as to its origin. Many ancient earthworks of this name exist across England and Wales, pre-dating the Anglo Saxon settlement of Britain. It was common for the Anglo Saxons to name features of unexplained or mysterious origin Grim. Most scholars believe that the name derives from the Old Norse word Grimr, an Anglo-Saxon alias for the Norse God of War and Magic, Wōden (called Odin by the Norse) and meaning "the masked one". The name of Wōden is thought by some historians to be evident in Wansdyke, an ancient earthwork of uncertain origin which runs from Wiltshire to Somerset. The historian W. H. Stevenson draws a link between Grim, the Saxon alias for Wōden, and the name of Grim's Dyke: Frank Stenton notes that there is no direct evidence that Wōden was known in England as Grim, but (citing supporting claims by Professor Eilert Ekwall) states that it was very probable. He mentions three sites named Grimes Wrosen: one outside Colchester in Essex; another in Warwickshire on the route of the Roman road Watling Street; and Credenhill in Herefordshire. These earthworks, Stenton asserts, were either considered to have been the supernatural work of Wōden himself, or sites connected strongly with the cult of Wōden where the Anglo-Saxons worshipped the god. Among Woden's many roles is that of a god of war, and it may be that the Anglo-Saxons perceived the earthworks