In a field of reclaimed pasture in Mortlestown, County Limerick, beside a public road, there once stood a small circular mound significant enough to be recorded by surveyors, yet which has left no visible trace on the ground as it exists today. Aerial imagery captured between 2011 and 2013 shows nothing. Google Earth confirms the same absence. Whatever was here has been absorbed entirely into the working landscape around it.

The mound does not appear on the 1840 edition of the Ordnance Survey Ireland six-inch map, which means it either escaped the notice of those early surveyors or had not yet been recognised as a feature worth recording. It does, however, appear on the later Cassini edition of the same map series, depicted as a small, circular form. Whether it was a burial mound, a ringfort remnant, or something else entirely is not recorded in the available sources. What lends the site an additional layer of interest is its proximity to Tobar Fhionáin, a holy well known locally by that name, which lies only ten metres to the south-west. Holy wells in Ireland are often ancient focal points of local devotion, frequently pre-dating Christianity and absorbed into it over centuries. The pairing of a mound with a nearby holy well is not unusual in the Irish landscape, and the two features together suggest a location that once carried some local significance, however difficult that significance now is to read.

For anyone visiting the area, the holy well, recorded under the Sites and Monuments Record reference LI056-009001, offers a more tangible point of focus than the mound itself, which has no surface remains to speak of. The site sits immediately west of a public road in reclaimed agricultural land, so access is a matter of knowing where to look rather than following a marked path. The well is the likelier of the two features to reward a visit in person, while the mound exists now almost entirely as a cartographic curiosity, present in the archive and absent from the field.