A series of linear ditches and the faint outlines of small fields press through the turf, detectable not by excavation but by shadow, crop variation, and the particular way that disturbed ground holds moisture differently from its surroundings. What makes this site quietly remarkable is that it does not appear on the Ordnance Survey maps at all, meaning it slipped through the standard cartographic record entirely and was only formally noticed because someone happened to photograph it from a plane.

The field system was identified during the Bruff aerial photographic survey in 1986, recorded as image Bruff 38 (AP 4/3671). Aerial survey of this kind works by capturing the way buried or earthen features cast shadows at low sun angles or alter the growth rate of grass and crops above them, a technique that has revealed enormous numbers of previously unrecorded sites across Ireland. The Garrison system sits in pasture bordered by the townland of Ballynaclogh to the east and Race to the south, with a separate set of enclosures recorded roughly 150 metres to the south-east under the reference numbers LI024-227/228. The compilation note, prepared by Martin Fitzpatrick and uploaded in July 2020, confirms that the features remained visible in Digital Globe orthophotos taken between 2011 and 2013, in an OSi orthophoto from 2005 to 2012, and in a Google Earth image captured in November 2018, suggesting the underlying earthworks are reasonably stable and not simply seasonal.

There is no formal public access to the site, which sits on private farmland, and because the features are subterranean earthworks rather than standing structures, there is little to see at ground level without specialist equipment or prior knowledge of the layout. The most practical way to observe the field system is through the freely available satellite and aerial imagery referenced in the record; the Google Earth orthoimage from November 2018 is particularly useful for picking out the linear ditch patterns. Visitors to the broader area around Bruff might combine an interest in this site with the nearby recorded enclosures to the south-east, bearing in mind that approaching either requires landowner permission. The value here is less in visiting than in appreciating that the ordinary-looking pasture of south County Limerick holds a stratigraphic memory of earlier land division that neither maps nor field boundaries have managed to erase.