DisgrifiadCropmarks indicating undated bivallate ditches or enclosure measuring 170 metres long. The cropmarks are located about 200m south west of the building at Crumbland farm, which is situated approximately six and a half miles east of Usk. Discovered during the Royal Commission's programme of archaeological aerial reconnaissance by Toby Driver on 29th June 2015.
RCAHMW, 7th September 2018.