The cropmark, captured in GSI photograph S 103-4, shows a large subrectangular enclosure that would have been a prominent feature of the landscape centuries ago. Today, nothing remains visible at ground level; the site has been completely absorbed back into the agricultural land, its secrets only betrayed by the subtle differences in crop growth that appear from above.

This type of feature, known as a moated site, was typically constructed between the 13th and 14th centuries by Anglo-Norman settlers and wealthy Irish families. The enclosure would have been surrounded by a water-filled moat, both for defence and as a status symbol, with the interior containing a manor house, outbuildings, and perhaps gardens. These sites represent an important phase in Irish history when new agricultural practices, architectural styles, and social structures were being introduced and adapted across the countryside.

The identification of this site through aerial photography demonstrates how modern archaeological techniques can reveal Ireland's hidden heritage. Cropmarks like this one appear because buried archaeological features affect soil depth and moisture retention, causing crops to grow differently above ancient walls, ditches, and foundations. While visitors to Archerstown today would see only ordinary farmland, the aerial evidence confirms that this quiet corner of Laois once hosted a bustling medieval homestead, complete with all the activity and ambition of its age.