This one is remarkable for what it no longer is. A standing stone that once occupied a north-facing slope at Lackabane in County Cork has been removed entirely, leaving no visible trace in the pasture where it stood. There is no stump, no socket hollow, no scatter of packing stones. Whatever once marked this particular piece of landscape has simply gone.

What survives is a single published record. A researcher named Condon, writing in 1916, documented the stone and recorded its dimensions: 57 inches high, 54 inches wide, and 11 inches thick. Those proportions are worth pausing over. At nearly five feet tall and almost as wide, this was a broad, squat slab rather than the tall tapering pillar that tends to come to mind when people imagine prehistoric standing stones. Stones of this type were typically erected during the Bronze Age, though their precise purposes remain debated; they may have marked territory, burial sites, astronomical alignments, or routes across the landscape. What makes the Lackabane stone additionally unusual is that it does not appear on either the 1842 or the 1904 Ordnance Survey six-inch maps, which suggests it was either already gone or simply overlooked by the surveyors at both moments when the countryside was being systematically recorded. Condon caught it somewhere between those silences, but not long before it disappeared for good.