But the mound sitting immediately to the south-west of the old avenue leading to Roche Castle in Ballycummin, County Limerick, is something considerably older. It is one of six fulachtaí fia recorded in close proximity to one another in this part of the county, a concentration that quietly signals just how active this landscape was in prehistoric times. A fulacht fia, for those unfamiliar with the term, is a burnt mound, typically Bronze Age in date, formed from the accumulated debris of a cooking or heating process in which stones were fired and then plunged into a water-filled trough to bring it to the boil. The mounds they leave behind are composed largely of cracked and fire-shattered stone, and they are among the most commonly recorded prehistoric monument types in Ireland.

This particular example, designated Site E within the cluster, came to light not through planned excavation but through archaeological monitoring carried out by Noel Dunne under licence number 98E0433. The monitoring was prompted by the construction of a dual carriageway associated with the Dell Factory Development in County Limerick, a project that brought groundworks across land that had previously formed part of the demesne of Roche Castle, an early nineteenth-century house. Most of what turned up during that phase of work related to relatively recent farming activity connected with the house, but fieldwalking to the south-west of the main site revealed the fulacht fia mound abutting the south-western boundary wall of the castle avenue. As recorded by Dunne in 1998, the rise measures approximately 15.5 metres north-west to south-east and 8 metres north-east to south-west, standing between 30 and 50 centimetres above the surrounding ground surface. The report notes that it may represent only the surviving south-western edge of what was originally a larger mound, the rest perhaps lost to later activity.

The site has not been excavated, so its precise date and character remain unconfirmed. It sits in what is now a landscape shaped by both industrial-era development and the genteel demesne planting of the early 1800s, layers that make the prehistoric traces here easy to overlook. Visitors to the general area should be aware that the land around the former Dell site has changed considerably since the monitoring was carried out in the late 1990s, and access to the mound itself is not straightforward. The site is best understood as part of the broader cluster of six recorded monuments in this townland, a grouping that rewards attention on a map even if the ground-level remains are modest and, for now, unexcavated.