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 the grid reference provided.


Isle of Man Government aerial photography (2015) confirms the faint presence of two, not quite concentric circular marks, in the area earlier indicated. The inner mark is the more blurred of the two and measures approximately 40m in diameter. The outer mark is better defined, particularly to the north and west, and appears to be a ring 65m in diameter.