Within the interior of a rath, a type of circular earthen enclosure typically associated with early medieval settlement and farming, a stretch of ground was set aside not for the living but for the very young dead. It is unenclosed, irregular in outline, and marked by a number of stones placed with what appears to be deliberate, regular arrangement. There are no high crosses here, no inscriptions, no formal churchyard boundary. Just stones, and the particular silence that tends to gather around such places.

Children's burial grounds of this kind, known in Irish as cillíní, were used for centuries to inter unbaptised infants and others who, under Catholic ecclesiastical convention, were excluded from consecrated ground. They appear across Ireland in marginal or liminal locations, often at the edges of fields, beside water, or, as here, within older earthworks whose own sacred or territorial significance may have made them seem appropriate for the purpose. The Ballyglass example sits within the northern portion of a rath, and it was recorded by McCaffrey in 1952, who noted specifically that this section of the interior had been adapted for use as a graveyard. The reuse of a prehistoric or early medieval enclosure as a burial site for the disenfranchised dead is not without precedent in Ireland, but it remains a striking layering of different eras of grief and exclusion onto a single patch of ground.