They do not appear on any Ordnance Survey historic maps, and nobody walking the ground would necessarily notice anything at all. What we know about this feature comes almost entirely from the air.

The site at Ballynahinch first came to light in aerial photographs taken on 3 November 1984, during survey work carried out for a Bórd Gáis Éireann gas pipeline, the Curraleigh West to Limerick route. The photographs, recorded at a scale of 1:5000, captured two linear cropmarks running parallel to each other in the field below. Cropmarks of this kind appear when buried features, whether ditches, banks, or walls, affect how vegetation grows above them, creating patterns readable from altitude that are invisible at ground level. The monument sits roughly 30 metres west of a watercourse that marks the townland boundary with Island Dromagh, and approximately 110 metres to the east of two possible barrows. The parallel lines were recorded again on a Digital Globe orthoimage taken between 2011 and 2013, and are visible once more on a Google Earth image dated 14 September 2019, confirming the features are persistent rather than a quirk of a single season's growth. The record was compiled by Fiona Rooney and uploaded to the national monuments database in June 2021. Whether the marks represent a genuine medieval field system or, as seems quite possible, post-1700 drainage channels dug during land reclamation efforts, remains an open question.

This is not a site with a car park or an interpretive panel. The field sits in working agricultural land near the townland boundary, and the features are not visible to anyone simply passing through. The most practical way to engage with what has been recorded here is through the aerial imagery available on Google Earth, where the two parallel lines can be picked out with some patience. For those interested in landscape archaeology and the long history of human effort to manage wet ground in the Irish midlands and west, this kind of ambiguous trace, possibly medieval, possibly post-medieval, definitely overlooked, is representative of how much of the Irish countryside remains unresolved beneath ordinary-looking fields.