Enclosures of this kind, a broad term covering anything from early medieval ringforts to later agricultural or settlement boundaries defined by earthen banks, ditches, or stone walls, are scattered across the Irish countryside in their thousands, yet those that survive within demesne landscapes carry a particular kind of strangeness. The deliberate shaping of estate grounds from the eighteenth century onwards often preserved older features by accident, folding them into parkland rather than ploughing them out, which means that ancient or early structures sometimes endure in the shadow of Georgian design.

Westport Demesne itself is the landscaped estate associated with Westport House, the seat of the Browne family, later the Marquesses of Sligo. The grounds were laid out in the eighteenth century, with the Carrowbeg River channelled to form ornamental waters, and the wider demesne shaped according to the prevailing fashion for naturalistic parkland. That a pre-existing enclosure should have survived within this setting is entirely plausible; estate improvement frequently worked around earthworks that were either too substantial to remove or simply left undisturbed at the margins of the designed landscape. Whether this particular enclosure is prehistoric, early medieval, or of some later agricultural origin remains, for now, an open question.