A substantial circular cropmark, estimated as 90 - 100 feet in diameter, was noted by AM Cubbon in June 1975, and estimated to be centred at SC2180069090.


Isle of Man Government aerial photography (2015) confirms the faint presence of two, not quite concentric circular marks, approximately in the area earlier indicated. The outer mark is better defined, particularly to the north and west, and appears to be a ring 65m in diameter; it is centred at the grid reference indicated.