This one exists almost entirely on paper. At Lissard in County Cork, a mound roughly ten metres across was recorded by the Ordnance Survey in 1842, marked on their six-inch map with the small radiating lines, called hachures, that cartographers used to indicate a raised feature on the ground. At some point after that survey was completed, the mound was levelled. Today there is no visible surface trace, and the slope where it once sat, facing north, is planted with trees.

What the mound originally was remains unknown. At around ten metres in diameter it falls within the range of a small burial mound or earthen barrow, features that appear across Ireland from the Bronze Age onward, though without excavation or further documentation it is impossible to say more than that. What gives it a quiet significance is precisely the gap between its appearance on the 1842 map and its absence from the present landscape. The Ordnance Survey's first large-scale mapping of Ireland in the mid-nineteenth century captured hundreds of earthworks, enclosures, and mounds that were already being eroded or disturbed by agricultural change. In many cases, as here, the map is the only record that something was ever there at all.