At Lerrig in north County Kerry, a circular enclosure once appeared on Ordnance Survey maps from both 1842 and 1897, suggesting it had survived long enough for two generations of surveyors to record it. Within that enclosure, according to the landowner, lay a souterrain, an underground stone-lined passage or chamber typically associated with early medieval settlement, used variously for storage, refuge, or ventilation of a dwelling above. By the time anyone thought to examine it closely, both the enclosure and its souterrain had been completely levelled, leaving no surface trace whatsoever.

The fact that the site appears on two separate OS maps separated by more than fifty years implies it endured well into the late nineteenth century, which makes its disappearance all the more pointed. Circular enclosures of this kind are generally understood as the remains of early medieval ringforts, the farmsteads of Gaelic Ireland, and souterrains are frequently found within them throughout Munster and beyond. The landowner's description of the souterrain as a fine one suggests it may have been reasonably intact at some point before the levelling took place. No date for that destruction is recorded.

There is nothing to see at Lerrig today. The site is noted here not as a destination but as a reminder of how much of the early medieval landscape has been quietly erased, often without record, and sometimes within living memory of people who could describe what had been there.