Others exist only as a faint circular shadow caught by a satellite on a particular winter morning. The site at Biddyford, in County Limerick, belongs firmly to the second category. What appears to be a barrow, the term used for a burial mound of prehistoric or early medieval origin, is detectable on reclaimed grassland not through any visible earthwork but through the differential way the ground holds moisture and supports vegetation, patterns that only become legible from above, and only under the right conditions.

The record for this site was compiled by Caimin O'Brien and uploaded in January 2020. The evidence rests almost entirely on a Google Earth orthoimage captured on 6 February 2018, which shows a small circular area in the reclaimed grassland at Biddyford. What makes this sighting particularly fragile as a piece of evidence is that an earlier Digital Globe orthoimage, taken sometime between 2011 and 2013, showed no surface remains at all. The circular feature may reflect seasonal waterlogging, soil disturbance from past agricultural activity, or the buried outline of a mound that has been almost entirely levelled by land improvement over the centuries. Reclaimed grassland in Limerick, like much of the Shannon basin, has been extensively drained and reshaped since at least the eighteenth century, and that process has a habit of reducing earthworks to near invisibility while leaving just enough of a footprint to show up in the right light.

There is nothing to see at ground level, and that is perhaps the most honest thing to say about Biddyford. The site is of interest primarily to those curious about how archaeology is now practised, with researchers piecing together tentative identifications from aerial and satellite imagery rather than excavation trenches. If you do find yourself in this part of Limerick and want to look, the reclaimed grassland offers no obvious landmark to orient yourself by, and the circular feature would be entirely invisible underfoot. Its existence, for now, is a matter of record rather than experience, a dot on a map supported by a single dated photograph and the patient work of someone who noticed something that almost everyone else scrolled past.