It looks, at first glance, like a prehistoric enclosure of the kind that punctuates the Irish countryside, the sort of low ringfort that farmers have been quietly ploughing around for centuries. But the archaeology is more equivocal here. The bank is low, barely a metre in height, and notably slight, lacking the solidity you would expect from a defensive or ceremonial structure built to last.

What the historical maps suggest is more mundane, and in its own way more curious. The 1842 Ordnance Survey six-inch map shows this feature as one of three circular tree plantations on the same grounds, companions in a deliberate landscaping scheme rather than relics of an earlier age. By 1904 it was being recorded as a circular enclosure, and by 1936 it was marked with hachures, the conventional cartographic shorthand for an earthwork with raised edges. The feature appears to have been reinterpreted over time, shifting in the official record from ornamental planting to apparent antiquity. A tree ring, which is essentially a formal circular grove planted as a landscape ornament, often around an eighteenth- or nineteenth-century house, was a fashionable addition to demesne grounds, providing visual punctuation and a degree of shelter. Given the proximity to Tullig House and the insubstantial character of the bank, that is the more likely explanation here, though no firm conclusion has been drawn.