That is, in fact, the only way this enclosure was ever formally recorded: spotted from altitude as a cropmark or soil variation, catalogued under the Bruff Survey, and assigned the reference Bruff 257.03.

The site was described by Doody in 2008 as an oval enclosure measuring approximately 45 metres east to west and 30 metres north to south, dimensions that place it in a range consistent with prehistoric domestic or ritual use. The shape and proportions, taken together, suggest it may date to the Bronze Age, a period in Ireland broadly spanning from around 2500 to 500 BC, during which enclosed settlements and ceremonial sites of roughly this scale were relatively common across the midlands and south. The identification came through aerial photograph reference AP 4/3710 as part of the Bruff Survey, Map 23, and was later compiled for the record by Denis Power. No excavation is documented in the available notes, which means the Bronze Age attribution remains an informed reading of form rather than a confirmed date.

Because the enclosure was identified from the air rather than through fieldwork, there is no guarantee of visible remains at ground level. Aerial features of this kind are often detectable only under specific conditions, particularly during dry summers when underlying ditches or banks affect the growth of overlying crops differently from the surrounding soil. A visitor to the Knockroe (Mason) townland should not expect an obvious earthwork; the landscape here is agricultural and quietly unremarkable in appearance. What is there, if anything, may amount to a slight unevenness in a field, or nothing at all to the untrained eye. The value of the record lies in what it adds to the cumulative picture of Bronze Age activity across this part of County Limerick, rather than in any dramatic physical presence.