This one is remarkable for what it no longer is. At Derryleigh in mid Cork, a standing stone that survived long enough to be mapped twice has since vanished entirely, leaving no visible surface trace. The ground gives nothing away.

The stone appeared on the Ordnance Survey six-inch maps of both 1842 and 1902, recorded on each occasion as a single upright stone. Standing stones of this kind are among the most common prehistoric monuments in Ireland, typically dating from the Bronze Age, though their precise function remains debated; they may have marked boundaries, burial sites, or routeways, or served purposes that left no other trace in the landscape. Whatever its original purpose, the Derryleigh stone endured into the era of systematic mapping, only to disappear sometime after 1902. By the time the site was assessed for the archaeological inventory of mid Cork, it was already gone, lost within an area of young forestry plantation. Whether it was toppled during planting, removed for use as building material, or simply absorbed into the ground is not recorded.