It measures roughly sixty metres along its longer axis and just over twenty metres across, standing no more than seven tenths of a metre above the surrounding grass. The surveyors who recorded it noted, with admirable caution, that it is possibly largely natural, which is another way of saying that the earth itself has not been forthcoming about its origins.

What complicates the picture is the cartographic record. When the first edition of the Ordnance Survey six-inch map was produced in the nineteenth century, this feature was marked as an oval enclosure, a category that in an Irish context typically suggests early medieval activity, the kind of enclosed settlement or boundary feature that dots the landscape across the country. Whether the original surveyors were interpreting a more pronounced earthwork that has since been reduced by centuries of agriculture, or whether they were themselves making an optimistic reading of a natural hummock, is now impossible to say with certainty. The gap between that confident cartographic label and the ambiguous lump of earth that exists today is itself a small, quiet puzzle.