An extensive earthwork feature on the flat plateau of Great Rhos. It covered an area 780m east-west by 360m. It consisted of earthwork banks enclosing a large area on the west with two smaller areas on the east. The bank in places was a double bank, separated by a flat area up to 8m wide. It does not show up on earlier aerial photographs but is very obvious on modern ones. All of the banks were covered in vegetation varying from grass to heather. J.J. Hall, Trysor, 24 September 2007