Cropmark suggesting a prehistoric defended enclosure measuring approximately 275m by 90m. The cropmarks are situated immediately south of the town of Monmouth on St. Dial's farm, in the field immediately east of the First World War practise trenches (NPRN 409493). Discovered during the Royal Commission's programme of archaeological aerial reconnaissance by Toby Driver on 29th June 2015.
RCHAMW 7th September 2018.