On the north-eastern slopes of Knockbrinnea mountain in County Kerry, a stone bearing prehistoric rock art was destroyed sometime in the late 1960s. It had stood in a field overlooking the plain of the River Laune, and by the time anyone thought to record it properly, it was gone, leaving only the accounts of local people who remembered seeing it.

What those informants described was a cupmarked stone, meaning a rock into which shallow, roughly circular depressions had been ground or pecked by hand, most likely during the Bronze Age. Cupmarks are among the oldest and most widespread forms of rock art in Ireland and Britain, and yet their purpose remains genuinely unclear. They appear on standing stones, on boulders, and on exposed bedrock, sometimes in isolation, sometimes grouped into patterns that suggest deliberate arrangement. The Lisleibane example, according to those who knew it, bore only cupmarks, with no surrounding rings or other elaboration. That simplicity is itself informative: not all rock art was complex, and the plainer examples are easily overlooked or dismissed, which may partly explain why this one was lost without a full record ever being made.

The site sits within the broader archaeological landscape of the Iveragh Peninsula, one of the more intensively surveyed stretches of south Kerry, where prehistoric remains are unusually numerous. That a piece of rock art could be destroyed here, within living memory, is a reminder that the archaeological record is not a fixed thing. Fields get cleared, stones get shifted or broken up, and what once seemed unremarkable to a landowner can turn out to be irreplaceable. There is nothing to visit at Lisleibane now, but the absence itself is worth knowing about.