This rectangular earthwork, situated 100 metres south of the Ballymurphy townland boundary, was first recorded on the 1897 Ordnance Survey map and continues to intrigue historians today. The site shares its landscape with other archaeological features, including an enclosure 230 metres to the east-northeast and a fulacht fiadh, an ancient cooking site, 260 metres to the northeast.

The Archaeological Survey of Ireland examined the monument in 2000, revealing its impressive dimensions: a rectangular area measuring 38 metres east to west and 30 metres north to south. The site is defined by a scarp, essentially an earthen bank about 2.2 metres wide and 0.2 metres high, with an external fosse, or defensive ditch, that once provided protection. This fosse, measuring 5.45 metres in total width with a base of 2 metres and depth of 0.3 metres, remains visible along the western and northern sides, though it has disappeared from parts of the eastern and southern edges. Over time, practical farming needs have altered the original structure; the fosse has been recut as a land drain at the northwest corner and along sections of the east side, whilst an earthen field boundary now follows its outer edge.

Modern aerial photography has added another dimension to understanding this site. Digital Globe orthophotos from 2011 to 2013, along with Google Earth images from 2015 and 2018, reveal the monument as a distinctive oval-shaped feature crowned with trees. This planted copse not only marks the site’s location in the pastoral landscape but also serves as a reminder of how medieval defensive structures have been absorbed and transformed by centuries of agricultural use, creating a palimpsest of Irish history written in earth and vegetation.