This one in Garrydoolis, on the western edge of a townland boundary with Knockaundoolis in County Limerick, does the opposite. It exists, for the most part, as an absence, a circular ghost pressed into the soil and readable only from the air, and even then only under the right conditions. It never appeared on any of the historic Ordnance Survey Ireland maps that charted the Irish landscape in such careful detail across the nineteenth and twentieth centuries. For most of recorded cartographic history, this field was simply a field.

The enclosure came to light during an aerial photographic survey centred on the nearby town of Bruff in 1986, when a circular shape was captured in the survey image catalogued as Bruff 122.10. What the camera caught was a cropmark, the faint but legible signal that buried archaeology leaves on the surface of agricultural land when differential moisture and soil depth cause crops growing above ancient ditches or walls to green up or ripen at slightly different rates to those around them. The site was confirmed again in an Ordnance Survey Ireland orthophoto taken sometime between 2005 and 2012, where the circular outline remained visible. By November 2018, when a Google Earth image was taken, it had vanished from view entirely, a reminder that cropmarks are seasonal, transient things, dependent on weather, crop type, and timing. The enclosure sits in improved pasture, and within a short radius there are further possible monuments: a suggested earthwork roughly 15 metres to the west, and a ring-barrow, a low circular mound typically associated with prehistoric burial, about 55 metres to the southwest. Field drains run along the immediate western and northern edges of the site, which may have affected both the archaeology and its visibility over time. The record was compiled by Martin Fitzpatrick and uploaded in April 2021.

There is, in practical terms, very little to see at ground level. The site sits in private farmland, and without the particular combination of dry spell, growing crop, and aerial vantage point that made it legible in 1986 and again in the following decade, the enclosure remains invisible to anyone standing in the field. The value in knowing it is there lies less in visiting than in understanding how much of the Irish archaeological record survives in precisely this form, noticed briefly from altitude, recorded, and then swallowed back into the ordinary appearance of a working landscape.