By 1916, the Ordnance Survey had grown more specific, marking it as a children's burial ground outright. The graves themselves are marked not by inscribed headstones but by small upright stones and low, sod-covered hummocks, densely packed across a roughly square area of about nineteen metres on each side. A remnant of an enclosing wall, about a metre wide, defines the north-western edge of the space.

This is a cillin, the Irish term for an unconsecrated burial ground used for unbaptised infants, a practice rooted in the older theological position that those who died without baptism could not be received into consecrated ground. Such sites are found across Ireland, often in liminal locations, old ring-forts, field boundaries, or shorelines, places that sat at the margins of the settled, churched world. At Boleyboy, local memory holds that the ground remained in use until the mid-twentieth century, receiving unbaptised babies and, on occasion, older children too. The name Caldragh, which appears on both the 1838 and 1916 Ordnance Survey editions, derives from the Irish "cealtrach", a word associated with burial places, sometimes applied to sites pre-dating Christian formal churchyards.

On the western side of the burial ground stands a single hawthorn tree, wind-twisted into an unusual shape that has earned it a local name: the umbrella tree. Hawthorns at sacred or liminal sites carry long associations in Irish folk tradition, often left uncut out of a mixture of respect and unease. This one, shaped by weather into something resembling shelter, marks the edge of a small, largely unvisited space where grief was managed quietly, outside official rites, for generations.