In Cummerduff, County Wexford, a megalithic tomb is listed in the historical record, yet when investigators looked for it on the ground, the landscape offered nothing conclusive, only a boulder-scattered slope and the quiet suggestion that someone, at some point, may have been mistaken.

The trail begins with Kinahan, who noted the ruins of a small cromlech in Cummerduff sometime between 1879 and 1888. A cromlech is an older term for a portal tomb or dolmen, the kind of Neolithic burial structure typically formed by large upright stones capped with a heavy horizontal slab. The location Kinahan described was plotted on a field map of the Geological Survey of Ireland, placing it on the north-facing slope of a col, the low saddle of ground between two hills roughly 400 metres apart to the east and west, each standing some 40 to 50 metres higher than the pass between them. It is the sort of terrain where glacial activity would have deposited loose boulders freely, and that may be precisely the problem. When the site was examined, the steep slope was found to be strewn with boulders in rough pasture, but no structural arrangement could be identified. There is no evidence, in the end, that any deliberate construction ever stood here.