That ambiguity is not a failure of record-keeping so much as the nature of the thing itself: a low, circular spread of stones no more than one to one and a half metres across, barely raised above field level, the kind of feature that agricultural improvement has a talent for erasing or obscuring almost entirely. A cairn, in the broadest sense, is a deliberate accumulation of stones, often placed over a burial and dating in Irish contexts anywhere from the Neolithic through to the early medieval period. This one, however, is so reduced that its prehistoric credentials remain uncertain, and it has never appeared on any Ordnance Survey historic mapping.

What documentation exists comes from a 1976 visit recorded in the National Museum of Ireland's Topographical Files. At that time, a field investigator noted the circular stone spread in reclaimed pasture, situated roughly 416 metres north of the townland boundary with Cahirguillamore and approximately 50 metres west of a second, similar spread. A third example was referred to in the same records but could not be located even then, which suggests either that land use had already obscured it or that the original reference was imprecise. The two that were observed were described as only slightly elevated above the surrounding field surface, the kind of low profile that is easily lost once grass closes over disturbed ground. No subsequent survey appears to have confirmed the features on aerial imagery, and neither Ordnance Survey orthoimages nor Google Earth photography shows anything identifiable at the location.

For anyone with a serious interest in finding this site, the honest position is that it may no longer be visible at all. The 1976 photograph held in the NMI Topographical Files offers a baseline, but the intervening decades of agricultural activity leave little reason for confidence that the stones remain exposed. The area is ordinary farmland, and access would require landowner permission. What makes the Ballycullane cairn, if it is one, worth knowing about is precisely this quality of near-erasure: it is the kind of record that survives only because someone walked a field in 1976 and wrote down what they saw before it disappeared entirely.