That absence is, in its own way, the point. A children's burial ground once occupied this rise in the landscape, and it was cleared away during land works carried out by the ESB, roughly a quarter of a century before the site was formally recorded. No surface trace survives.

The site belongs to a category of burial place found across Ireland known as a cillín, sometimes also called a killeen or children's burial ground. These were informal, unconsecrated plots used for centuries to inter unbaptised infants, stillborn children, and occasionally others considered ineligible for burial in consecrated ground under Catholic ecclesiastical law. They tend to occupy liminal or marginal spaces, old ringforts, boundary ditches, shorelines, or, as here, small hillocks set apart from the working landscape. Their use reflects the intersection of canonical restriction and community necessity; families needed somewhere to bury their children with care and dignity, even when the Church offered no official place. The Clonbrock example sat within demesne land, the enclosed private estate of the Dillon family whose seat, Clonbrock House, was one of the significant Anglo-Irish estates of east Galway. That such a site existed within or adjacent to that landscape points to the presence of a local rural community whose burial practices operated quietly alongside the more formal order of the estate.