In a field of improved pasture at Ballybeg in County Mayo, overlooked by rising ground to the north, an enclosure that was carefully recorded by nineteenth-century surveyors has since vanished entirely, leaving not so much as a ripple in the grass to mark where it once stood.

The Ordnance Survey's six-inch map of 1838 shows a circular embanked enclosure roughly 25 to 30 metres in diameter, the kind of modest earthwork, probably a ringfort or enclosure of early medieval date, that once dotted the Irish countryside in considerable numbers. By the time the more detailed 25-inch survey was made, the feature was recorded differently, described as subrectangular rather than circular, measuring approximately 22 metres on each axis, and accompanied by an external fosse, a shallow defensive ditch running around the outside of the bank. Whether the change in shape reflects genuine alteration to the site between surveys, or simply a difference in how each surveyor interpreted what they saw, is impossible to say now. What is certain is that by the 1916 revision of the six-inch map, the enclosure had disappeared from the record altogether, absorbed into the agricultural improvements that reshaped so much of the Irish landscape during the nineteenth and early twentieth centuries. Today there is no visible trace at ground level.

What makes the location linger in the mind is the company it keeps. Some 130 metres to the northwest lies another enclosure, and 215 metres to the southeast stands an ogham stone, one of those upright slabs incised with an early medieval script running in notches along the stone's edge. Whether these three features were ever meaningfully connected in use or in time is unknown, but their proximity suggests that this unassuming stretch of Mayo pasture was once a place of some significance, even if the land itself has long since forgotten it.