No mound breaks the surface, no ditch catches the eye, no stone protrudes from the grass. What exists here, if it exists in any legible form, is visible only from the air, and even then only under the right conditions, when soil moisture or crop stress causes buried features to express themselves as faint linear marks across the land.

The site came to light, in the most literal sense, during aerial photography carried out on 3 November 1984, as part of survey work for the Bórd Gáis Éireann Curraleigh to West-Limerick gas pipeline. Cropmarks, the ghost-outlines that buried ditches or banks leave in growing vegetation when seen from above, appeared across a considerable area, roughly 500 metres northwest to southeast and 220 metres in the perpendicular direction. Some of the linear marks run at right angles to one another, suggesting the organised geometry of a field system rather than a natural feature. A related field system, recorded separately under the reference LI040-136, lies immediately to the east. The site does not appear on any Ordnance Survey Ireland historic mapping, meaning it was never recorded through conventional ground-level observation. Further aerial imagery from the Archaeological Survey of Ireland, taken in January 2003, also captured the marks, but by September 2019, a Google Earth orthoimage showed no surface remains at all. The record was compiled by Martin Fitzpatrick and uploaded to the national monuments database in July 2021, with a note that this earthwork may even be a duplicate entry for the adjoining field system rather than a wholly separate site.

There is genuinely nothing to see here in the conventional sense of a site visit. The townland boundary with Island Dromagh is marked by a watercourse running just to the south, and the ground is described as wet pasture, so underfoot conditions are likely to be difficult outside of dry spells. What this site actually offers is a different kind of encounter, with the limits of the archaeological record itself. The question of whether these are the outlines of ancient field boundaries, and whether they represent one site or two, remains unresolved. Anyone with an interest in how landscape archaeology works, how much is invisible at ground level and legible only from above or through archival photography, will find the story of Hammondstown a useful illustration of how tentative and contingent these records often are.