It appears only once, on the 1914 edition of the Ordnance Survey six-inch series, and it cannot be seen today. In all likelihood, it was never much to look at in the first place.

The mound was almost certainly placed by the Ordnance Survey itself, a quiet act of bureaucratic cartography rather than anything ancient or ceremonial. Boundary mounds of this kind were sometimes set up by survey teams to fix administrative or townland limits on ground that offered few natural landmarks. A blanket bog, waterlogged and featureless for long stretches, would have been exactly the kind of terrain that demanded such markers. The bog at Cuilbalkeen is raised bog, meaning it has accumulated deep layers of peat over millennia, slowly building up above the surrounding landscape. Whatever was placed there has long since been swallowed, or was simply too modest to survive the bog's slow, ongoing work.