The qualification matters here: said to be. There is no visible surface trace, and the claim rests on local tradition rather than anything confirmed by excavation or survey.

The source for the tradition is Bowman, writing in 1934, who recorded the oral account without being able to point to physical evidence. Bowman also noted what he interpreted as souterrains built into the fosse side of the inner rampart, though these have since been identified as two lime kilns, the kind of small, stone-built furnaces once used to burn limestone for agricultural lime. It is a small but telling detail: what one generation reads as prehistoric or early medieval construction, another recognises as post-medieval industry. The ringfort itself remains, but the underground feature it supposedly contains has left no mark that anyone has since been able to find.