The image, catalogued as CUCAP AJV094 and shot at an oblique angle, shows a series of earthworks near the site of an Augustinian nunnery. Whether those marks in the landscape represent deliberate human activity or simply the way limestone breaks through the surface is, decades later, still an open question.

The photograph was taken as part of the Cambridge University Collection of Aerial Photography, a project that systematically documented the Irish and British landscape from the air and has since revealed countless features invisible at ground level. At Ballynagallagh, the oblique angle catches low light and shadow in a way that vertical photography often cannot, bringing linear features into relief. Researcher Caimin O'Brien, who compiled the record uploaded in August 2019, notes that some of what appears in the image may simply be natural rock outcrop, a common enough occurrence in Limerick's limestone country. Other features, however, are more suggestive: possible traces of a medieval road, along with field boundaries that may have defined the agricultural land attached to the nunnery. Field systems of this kind, dividing land into managed plots, were a practical feature of monastic life throughout medieval Ireland, and the Augustinian community at Ballynagallagh would have depended on surrounding land for its survival. The antiquity of these particular features remains unresolved.

Ballynagallagh is a rural townland, and the earthworks themselves are not formally marked or signposted. Anyone curious enough to investigate should approach through the surrounding countryside with the usual consideration for private farmland, and would benefit from consulting the aerial photograph beforehand to understand what to look for. At ground level, the features may register only as subtle rises and depressions in pasture, the kind of thing that makes more sense once you have seen it from above. Early morning or late afternoon in summer, when low-angle light throws shallow earthworks into shadow, offers the best conditions for reading a landscape like this.