This one in Camas, County Limerick, exists almost entirely as a ghost. It was not noticed by anyone recording monuments on the ground, it does not appear on Ordnance Survey Ireland historic maps, and by the time satellite imagery caught up with the area, there was nothing visible at all. What brought it to attention was a single aerial photograph, taken in September 1982, which showed a circular cropmark or soil stain in the wet pasture below.

The photograph in question was not taken for archaeological reasons. It was captured on 11 September 1982 as part of a survey conducted by Bórd Gáis Éireann during the planning of the Curraleigh West to Limerick gas pipeline, at a scale of 1:50,000. Cropmarks and soil stains of this kind are one of the primary ways buried archaeological features are detected from the air. Where a circular enclosure, perhaps the remains of a ringfort or an early settlement boundary, lies beneath the surface, the soil above it behaves differently to surrounding ground, retaining moisture or drying out at a different rate, which causes the vegetation above it to change colour or grow unevenly. These variations become legible from altitude in ways that are simply invisible at ground level. The site sits roughly fifty metres west of the townland boundary with Garbally, in ground described as wet pasture, which is itself the sort of heavy, low-lying land that tends to preserve buried features well, even as it makes surface detection difficult. No subsequent aerial or satellite imagery, including OSi orthophotos taken between 2005 and 2012 and Google Earth images, has confirmed the mark.

For anyone curious enough to look for it, the site is not signposted and offers nothing visible to the naked eye in the field. The record was compiled by Martin Fitzpatrick and uploaded to the relevant heritage database in May 2021, meaning it sits in that uncertain category of possible monuments, identified but unverified, not excavated, not dismissed. The wet pasture setting means the ground may be heavy going depending on the season. There is no public monument here to read or photograph, but the location raises a question that many Irish fields quietly carry: what the topsoil is keeping to itself, and what it takes, sometimes a pipeline survey, sometimes a dry summer, to make it briefly legible.