Aerial photography reveals a great deal that the naked eye cannot, and the pastureland at Walterstown in County Kildare offers a good example of that gap between what is seen and what is merely visible. A geological survey photograph, catalogued as GSI N 346-7, shows what appears to be a cluster of roughly six small, closely associated rectangular enclosures. On the ground, the only hint of anything unusual is a series of slight undulations in the grass, the kind of gentle surface irregularity that a casual walker might attribute to nothing more than uneven grazing.

Rectangular enclosures of this kind appear across the Irish landscape and are notoriously difficult to date or interpret without excavation. They may relate to agricultural activity, settlement, or land management from any number of periods. When a private dwelling house was proposed at the eastern edge of the Walterstown site in 2005, the development triggered archaeological trial trenching under Excavation Licence no. 05E1049. That investigation, confined to the eastern limits of the complex, produced no archaeological evidence, leaving the origin and purpose of the enclosures as open a question as before. The absence of finds is itself informative, suggesting either that this part of the site was peripheral, or that whatever activity occurred here left little material trace, though it would be unwise to draw firm conclusions from a partial investigation.