The mound, it turned out, was almost certainly the remains of a clochaun, a small dry-stone hut recorded on earlier surveys as a circular heap of stones. Earlier accounts had attributed the find to a souterrain nearby, a souterrain being an underground stone-built chamber or passage, often associated with early medieval settlement, used variously for storage, refuge, or both. The confusion is understandable: the two features sit close together within the same enclosure, and both belong to a site layered with occupation across different periods.

The ringfort known as Lisrobert, or Lios Roibeáird, or Lios an Bhúlaeraigh in Irish, takes the form of a single earthen bank and fosse enclosing a roughly oval interior measuring around 42 metres by 33 metres. The fosse, the defensive ditch running around the outside of the bank, averages five metres wide and 1.3 metres deep. The bank itself rises about three metres above the fosse floor, and portions of its inner face retain drystone revetment, stone lining used to stabilise the earthen structure, generally only two or three courses high but possibly once continuous around the full circuit. Some of this stonework may have been robbed during the construction of a road that now skirts the western side of the site. The entrance, approached by a causeway to the south, is lined on its eastern side with drystone masonry. Inside, the ground is marked by a series of east-west cultivation ridges, traces of the agricultural use to which the enclosed space was put long after any defensive function had lapsed. The bronze axehead the landowner found, registered with the National Museum of Ireland as NMI 1944:275, adds a further dimension, suggesting activity at or near this location well before the early medieval period when most ringforts were in use.

The souterrain in the south-east of the interior consists of a sub-circular stone-built chamber opening off the north-west side of a second chamber or passage, the latter now visible only as an irregular depression. Local knowledge suggests that further small passages once led off this depression, their entrances likely buried under accumulated household debris. The main chamber, though inaccessible, can be viewed through its entrance opening. It is roofed by a single large slab and, according to local accounts, contains a stone seat, measuring roughly one by two metres at its base and standing between 1.5 and two metres high.