This one, recorded in the townland of Grillagh in County Limerick, leaves almost no trace at all. It exists in the archaeological record largely because of what turned up in someone's garden: seven flint scrapers, nine miscellaneous flint artefacts, and fragments of a coarse ware vessel, the kind of plain, hand-built pottery associated with early prehistoric occupation. No earthwork, no structure, no visible disturbance in the ground. Just the objects, and the inference that people once lived here.

The site was identified and catalogued by Grogan in 1989, who designated it Grillagh 2 and described the find assemblage in his thesis. Flint scrapers are small, worked stone tools used for tasks like cleaning animal hides or processing plant material, and their presence alongside pottery is typically taken as evidence of domestic activity rather than, say, a burial or ritual deposit. What makes the Grillagh site particularly elusive is that the original thesis is not held in accessible paper files, meaning the precise location recorded by Grogan cannot be independently confirmed. The site does not appear on Ordnance Survey Ireland historic maps, and aerial orthoimages taken between 2005 and 2018, including those from Digital Globe and Google Earth, show nothing at the relevant location in what is now improved pasture, roughly 35 metres south-southwest of a dwelling house and 70 metres east of a public road that doubles as the boundary between Grillagh and the neighbouring townland of Tullybracky.

For anyone drawn to the archaeology of absence, there is a particular kind of interest in coming to a place like this. The surrounding landscape offers no obvious focal point, no marker, no interpretation panel. The watercourse lying some 65 metres to the west is perhaps the most enduring feature connecting the present ground to whatever activity once took place here, since prehistoric habitation sites frequently cluster near reliable water sources. The record was compiled by Alison McQueen and Vera Rahilly and uploaded in November 2020, and the uncertainty they noted about the monument's precise location has not since been resolved. It is, in a quiet way, a site defined by what cannot be pinned down.