Others are defined entirely by absence. In a patch of pasture at Killeen in mid Cork, there is nothing to see at all, and that absence is itself the record. A standing stone once rose here, one of those solitary upright megaliths that punctuate the Cork countryside with a quiet, unexplained authority, and at some point it was removed. No visible trace remains at ground level.

The existence of the stone depends on a single source, a researcher identified as Hartnett (PJH), whose fieldwork noted the stone's location and was later incorporated into the published Archaeological Inventory of County Cork. Standing stones of this kind are among the most enigmatic monuments in the Irish landscape. Erected most commonly during the Bronze Age, they resist easy interpretation; some appear to mark boundaries or routeways, others may have had ritual functions, and many cannot be reliably dated at all without excavation. What happened to the Killeen stone is not recorded. Farmers have always had practical reasons to remove large upright stones from grazing land, and countless examples across Ireland have been toppled, buried, or broken up over the centuries, their original positions surviving only in a note, a placename, or a slight rise in the ground.