In the summer of 1948, workmen stripping a low cliff face at Rockbarton in County Limerick, preparing the rock for quarrying as road metal, broke into something considerably older than any road: a small natural chamber formed by an inclined slab-like boulder leaning against the rock face, its interior packed with earth and the accumulated dead of several prehistoric generations.

When John Hunt excavated the site in 1967, what he found inside was layered and complicated in ways that suggested centuries of use rather than a single burial event. The chamber itself was modest, roughly 1.83 metres long, narrowing from about 1.37 metres wide at the south end to under a metre at the north, and standing to around 1.9 metres in height. Within it, a mixed and disturbed group of inhumations had been deposited over a long span of time, accompanied by sherds of plain Western Neolithic pottery, two decorated Neolithic vessels, two Beakers, and fragments of two pins. Beakers are a type of distinctive pottery associated with the early Bronze Age in Atlantic Europe, and their presence alongside earlier Neolithic wares suggests the chamber was revisited and reused across what may have been a thousand years or more of prehistory. Set slightly apart from this jumbled assembly, in a pit banked up at the chamber entrance, was a single crouched inhumation, a burial posture common to the Neolithic period, accompanied by a fragment of a stone axehead and a decorated pot that has since been compared to a vessel found at Rath in County Wicklow, pointing to connections across the island in a period long before recorded history.

The site is not a monument in any conventional sense; there is no megalithic tomb, no standing stone, no managed visitor access. Its significance lies almost entirely in what was removed from it and what that material tells archaeologists about the long continuity of burial practice in the Irish Neolithic and early Bronze Age. Anyone with a particular interest in the find would do better to trace the excavation report and associated pottery comparisons through Hunt's 1967 publication and the later work of Brindley and Lanting, rather than to expect anything visually dramatic at the location itself. What survives at Rockbarton is essentially the rock face, minus what the workmen nearly destroyed.