 The Mills are an "Anchor Point" of the European Route of Industrial Heritage, set in of parkland and containing 21 buildings of major historical importance.The story of gunpowder production at Waltham Abbey begins with a fulling mill for cloth production; originally set up by the monks of the Abbey on the Millhead Stream, an engineered water course tapping the waters of the River Lea.Mills were adaptable and in the early 17th century it was converted to an 'Oyle Mill', i.e.