It appeared only later, on the Cassini edition of 1915, which raises the quiet question of whether it was simply missed the first time, or whether mapmakers of that earlier period did not consider it worth recording at all.

The enclosure is nearly circular, measuring about 19.5 metres north to south and 18.7 metres east to west, and is defined by a loosely constructed single drystone wall, the kind built by setting stones without mortar, relying on weight and fit to hold the structure together. At the southern side, two inclined jamb stones form a narrow entrance, splayed slightly so it widens from 0.4 metres at the base to 1.2 metres at the top, though it is now blocked by two placed stones. A single stone set upright on its edge marks the northern side of the interior. What makes the layout more complex than a simple pen or field boundary is the presence of annexes: a small rectangular one, roughly 4.2 metres east to west and 3.2 metres north to south, abuts the outer wall at the northwest, and traces of a second, smaller annex survive at the northeast. Enclosures of this type in the Irish landscape could have served any number of purposes across a broad span of time, from early medieval stock management to later agricultural use, and without excavation the function here remains genuinely open.

The terrace setting is itself worth noting. The level ground and the unobstructed sightlines out to sea suggest a position chosen deliberately, whether for watching, for shelter from prevailing winds on higher ground, or simply because flat limestone pavement offered a practical building surface. The entrance faces south, away from the Atlantic exposure.