Rectangular cropmark measuring approximately 20 metres by 40 metres, consisting of one large rectangle divided in two. The cropmark is situated about 500 metres east of Trewarren House (NPRN 265280), which is located on the south-eastern edge of the village of St. Ishmael's. Discovered during the Royal Commission's programme of archaeological aerial reconnaissance conducted by Toby Driver on 13th May 2015.
M. Ryder, RCAHMW, 18th September 2018.