WANSDIKE, (Wiltshire) is a ditch that runv across the Co. from E. to W. over Salisbury-Plain, for many m. together, supposed to have been cast up by the Saxons for a boundary bet, the West Saxons and the Mercians, or for their defence against the incursions of the Britons. It may be traced frem near Bath all over the Downs to Great-Bedwin.