The structure appears on the 2nd edition of the Ordnance Survey 6-inch map, marking its location for posterity, but when archaeological surveyors went looking for it, they found nothing remaining of what was once there. Whether it succumbed to natural erosion, agricultural development, or simply the passage of time remains unknown.

This phantom enclosure represents one of many archaeological features across Donegal that exist now only in historical records and old maps. The county’s landscape is dotted with such lost sites; ancient structures that were documented by earlier generations of cartographers and antiquarians but have since disappeared from the physical world. These absences tell their own story about how Ireland’s archaeological heritage has been shaped by centuries of land use, development, and environmental change.

The information about this lost enclosure comes from the comprehensive Archaeological Survey of County Donegal, compiled in 1983 by Brian Lacey and his team of researchers. This survey attempted to catalogue every known archaeological site in the county, from prehistoric remains through to 17th-century structures, creating an invaluable record of both surviving monuments and those that exist only in memory. For sites like the Ballynacarrick enclosure, these documentary traces may be all that remain of structures that once played a role in the lives of past communities.