Aerial photographs of the area reveal cropmarks, the differential growth of crops above buried features that betray the presence of disturbed soil or subsurface structures, tracing out a large, irregular enclosure consistent with an early field system. The age of this system is uncertain, which is itself part of what makes it interesting: the landscape here is clearly organised and bounded, but by whom, and when, remains an open question.

Within the boundaries of the field system, a separate cropmark enclosure is visible, though it may not belong to the same period of activity as the surrounding fields. The two features could represent different phases of land use, overlapping by coincidence rather than design. Just outside the north-western edge of the field system sits a ring-ditch, a circular ditched feature often associated with prehistoric funerary or ceremonial activity, though again the relationship between it and the field system is unclear. The aerial photographs that reveal all of this, referenced as GB95.FR.30 and GB95.FS.12, were analysed by Dr Gillian Barrett, whose broader survey of Carlow from the air was published in the 2008 volume County Carlow: History and Society. That publication reproduces one of the Clonmelsh photographs as an illustrative example of what aerial archaeology can uncover across a county not always associated with monumental or well-publicised sites.

What makes Clonmelsh worth knowing about is precisely the modesty of the evidence. There is no visible monument, no standing stone, no earthwork a visitor could walk around. What exists is a palimpsest read only through the camera lens at the right season and light, when ripening crops betray the invisible geometry of earlier lives worked into the soil.