First documented in detail during the 1942-3 archaeological survey, only portions of the original earthwork survive today. What remains consists of two sections of bank and fosse; one arm curves eastward for about 49 metres whilst the other runs straight for approximately 46 metres, meeting at an angle slightly less than ninety degrees. The fosse, or defensive ditch, runs along the outside of the bank, a common feature in medieval fortifications.

The peculiar angular configuration has led archaeologists to speculate about the monument’s original form. O’Kelly, who surveyed the site in the early 1940s, suggested it might once have been D-shaped, though the incomplete nature of the remains makes certainty impossible. The surrounding field contains traces of old fence lines cutting across the landscape, but whether these boundaries are contemporary with the enclosure or from later agricultural use remains unclear.

Modern technology has added another layer to our understanding of this site. Digital Globe aerial photographs reveal cropmarks suggesting the earthwork may actually have been square in plan, rather than the D-shape proposed by earlier surveys. These cropmarks, visible only from above and under certain conditions, show where buried archaeological features affect crop growth, potentially revealing the full footprint of this mysterious enclosure that has puzzled researchers for decades.