In a valley to the west of Knockbrack in Derrylahan, County Kerry, a standing stone once rose from undulating pasture. It no longer does. What remains is essentially a location, a coordinate where something prehistoric once stood, now reduced to a slight mound of field-clearance debris nearby.

The stone appears on both the 1846 and 1895 Ordnance Survey six-inch maps, which means it was still a legible feature of the landscape well into the nineteenth century. At some point between its last cartographic appearance and the present, it was removed or collapsed entirely, leaving no visible trace. The field-clearance mound in the vicinity is suggestive: farmers working land have long gathered surface stone into piles, and a standing stone, already toppled or leaning, would have been a practical candidate for incorporation into such a heap. Standing stones of this kind are generally prehistoric in origin, raised as boundary markers, ritual focal points, or commemorative monuments, though their precise purposes are rarely recoverable. What is recoverable, in this case, is only the map evidence that it was once there, and the faint possibility that the stone itself has not gone far.