This one is remarkable, in a quieter way, for what does not. In a field near Lough Gur in County Limerick, a short distance from one of the largest and best-preserved prehistoric stone circles in Ireland, there is a site recorded on later maps simply as 'Dolmen (site of)'. No capstone, no uprights, no visible chamber. Just a low rise of pasture ground, 10 metres from the roadside hedge, carrying the ghost of something that was already gone before cartographers took a serious interest in it.

The monument does not appear on the Ordnance Survey six-inch map of 1840, nor on the twenty-five-inch edition of 1897, which suggests it had been largely dismantled or buried well before either survey was made. What little is known comes through an indirect chain of testimony. P. J. Lynch, writing in the 1927 Ordnance Survey Name Book, recorded that the monument had been destroyed, and that its precise location had been pointed out to him by the former landowner, a man named Edward Fitzgerald. Earlier, in 1895, Lynch had called it a 'Cromlech', the older term for what we would now generally call a portal tomb or dolmen, and noted Fitzgerald's account that the supporting stones had once leaned closely towards each other from either side, with a series of flat flags running northward from it towards the great stone circle at Grange. That stone circle lies just 30 metres to the north-east. Whether the flagged trackway, known as Cladh na Leac, was genuinely connected to this structure or represents a separate feature of the landscape is unresolved. The Megalithic Survey of Ireland, compiled by De Valera and Ó Nualláin in 1982, catalogued the site but was candid that the original form of the monument remains unknown.

The site sits within one of the most densely packed prehistoric landscapes in Ireland. Within a few hundred metres there are two further stone circles to the north, a standing stone to the south-east known as Cloch á Bhíle, a feature recorded as Giant's Grave, and a trapezoidal arrangement of stones to the north-west that may be the remains of a court tomb, a Neolithic communal burial monument typically featuring an open forecourt flanked by upright stones. The great Grange stone circle itself, a massive embanked ring of contiguous stones, is the obvious draw for most visitors. But the destroyed dolmen site, visible in aerial imagery and duly logged in the national record, is a reminder that the landscape around Lough Gur was shaped by repeated, overlapping acts of construction over millennia, most of which left traces that are now partial, ambiguous, or entirely gone.