The only problem is that, when archaeologists went looking, they could not find it. The site exists in the record but not, apparently, on the ground.

What is known is minimal but telling. A forestry inspector reported the site to the Office of Public Works in 1973, presumably having noticed something in the landscape during the course of their work among the trees. Forestry operations have long been associated with both the discovery and the destruction of archaeological monuments in Ireland; a trained eye moving through planted ground can sometimes spot a raised bank or a circular depression that otherwise goes unnoticed, but the same ground clearance and planting activity can also obscure or obliterate features that once showed clearly. Whether that is what happened at Castlewaller is unknown. Subsequent investigation failed to locate anything matching the marked position, leaving the site in a kind of archival limbo, recorded but unverified, present on paper and absent in the field.