Barrow (Ditch barrow), Raheen (Coshlea By.), Co. Limerick
Co. Limerick |
Barrows
In a pasture field in County Limerick, a prehistoric burial monument lies completely invisible at ground level.
There is no mound to visit, no standing stone to photograph, no marker of any kind. The site exists, as far as anyone can tell from the surface, only as ordinary farmland. What revealed it was a circular shadow in the grass, appearing briefly and under the right conditions from high above.
The monument is classed as a ditch-barrow, a type of prehistoric funerary enclosure defined not by a raised earthwork but by a surrounding ditch, the spoil from which may once have formed a low internal mound now long since flattened by centuries of agriculture. It sits in Raheen townland in the barony of Coshlea, roughly 105 metres east of the townland boundary with Mitchelstown East, with two other recorded barrows lying approximately 60 metres to the west and south. The site never made it onto the Ordnance Survey six-inch maps, the nineteenth-century baseline survey that recorded much of Ireland's visible archaeology. It was first flagged as a possible monument in aerial photographs taken on 3 November 1984 during survey work for the Bórd Gáis Éireann Curraleigh West to Limerick gas pipeline, where it appeared as a circular cropmark roughly five metres in diameter. Cropmarks like this form when buried features, such as a filled ditch, affect how overlying vegetation grows, producing subtle differences in colour or height that are invisible from the ground but legible from the air, particularly in dry summers when grass above a moisture-retaining ditch stays greener longer. The monument was later confirmed on Digital Globe orthoimagery from 2011 to 2013 and was clearly visible again on a Google Earth image dated 18 November 2018. The record was compiled by Fiona Rooney and uploaded to the national monuments database in September 2021.
There is, practically speaking, nothing to see here on a visit. The site is in private agricultural land, and the feature itself is only legible from aerial imagery. Anyone with a curiosity about it would do better to search the National Monuments Service database, where the aerial photographs and orthoimages are referenced, than to make a journey to the field. What the site does offer, at a remove, is a reminder of how much of the Irish prehistoric landscape remains below the surface, unrecorded until a pipeline survey or a dry August makes the invisible briefly, unexpectedly apparent.