A promontory fort is a defended enclosure using a natural headland, with the sea or a cliff providing much of the perimeter; within such forts, evidence of habitation is comparatively rare and often poorly preserved. This structure is no exception.

The antiquarian Thomas Johnson Westropp recorded it in 1911, noting it as the western house of a second cluster of conjoined cells on the north-eastern side of the fort interior. He described walls of earth and stone, a structure measuring fifteen feet, roughly four and a half metres, across along the cliff edge, and standing to a height of just one foot, about thirty centimetres, at the time of his visit. Even that modest height has since diminished; only fragmentary traces now survive. Westropp noted it alongside a companion structure to the east, the two appearing to have formed a connected pair, though whether they were contemporary with the fort itself or represent a later phase of occupation within it remains unclear.