What remains at Rathealy is a puzzle in subtraction, a place where the absence of things is almost as informative as what survives.

Writing in 1905, the historian William Carrigan recorded visible traces of buildings in the field immediately east of the local church, along with a square enclosure that he believed marked the site of a castle. By the time anyone looked systematically, that evidence was gone. A field inspection carried out in 1987 found that the land to the east of the church had been reclaimed for agriculture, with no structures or enclosures left to examine. Yet the same inspection was not entirely without reward. Two structures were identified: one sitting within the graveyard itself, towards the eastern end of its northern boundary, and a second roughly ten metres to the north-northeast of the graveyard's corner. Just north of that second structure, a wide earthen bank survives, tentatively interpreted as part of a hollow-way, essentially a sunken trackway worn down by centuries of foot and animal traffic, running roughly east to west. Its western portion appears to have been lost when a later, larger enclosure was built across the area after the graveyard was established. The surviving stretch of this bank seems to point towards the entrance of a nearby ringwork, a type of circular defensive earthwork common in the medieval period, suggesting the hollow-way once formed part of the organised movement of people around a functioning settlement.

What Rathealy presents today is a layered palimpsest of erasure: agricultural improvement removing what Carrigan could still see in the early twentieth century, and earlier construction having already removed part of what predated it. The slight bank and those two grassed-over structural traces are, for now, the last legible fragments of a community whose name survives but whose shape has largely been reclaimed by the ground.