A bullaun stone, one of those curious hollowed rocks used in early Christian Ireland for grinding grain or holding holy water, was documented here in 1889 by the antiquarian George Henry Kinahan. Alongside it, he recorded cupmarks; those enigmatic circular depressions carved into stone that have been found across Ireland and Britain, their purpose still debated by scholars. Yet when modern archaeologists attempted to relocate these features, they found themselves empty handed.

The disappearance of the Lacknacoo stones raises intriguing questions about the fate of Ireland’s archaeological heritage. Did the bullaun stone lie in a field that was subsequently cleared for agriculture, its ancient surface broken up for building material? Perhaps it was moved to serve as a gatepost or incorporated into a nearby wall, as happened to countless prehistoric monuments during the 19th and 20th centuries. The cupmarks, being more subtle features, might simply be hidden beneath decades of moss and lichen growth, waiting to be rediscovered by a sharp eyed walker.

This lost monument serves as a reminder of how fragile our connection to the past can be. Kinahan’s brief note, preserved in the Archaeological Survey of County Donegal compiled in 1983, is now the only evidence we have that these stones ever existed. It joins a long list of Irish antiquities known only through historical records; phantom monuments that once dotted the landscape but have since vanished into the realm of memory and archive.