The cropmark shows a roughly square enclosure, measuring about 52 metres north to south and 64 metres east to west, defined by a scarp, fosse, low bank and external fosse. This ancient feature sits on a slight rise, with cultivation ridges still visible running north to south across its interior, testament to centuries of agricultural use.

The site’s location is particularly intriguing, positioned just south of an old mill race and corn mill, with Pallas church, graveyard and ecclesiastical enclosure about 230 metres to the north-northeast. Pallas Castle and its bawn stand just 60 metres to the east, whilst Pallas Bridge lies 30 metres to the south-southeast. A stream marking the townland boundary with Pallas runs 30 metres to the east. This concentration of medieval features suggests the area was once a significant settlement, and the earthwork’s proximity to these structures hints at its importance.

Historical records add another layer to the mystery. The 1654-7 Down Survey map of Dorrha parish depicts a medieval watermill called ‘Pallis’ standing on the west side of the stream, remarkably close to where this cropmark appears today. The earthwork could be related to this medieval mill complex, or it might even be the original ‘Pallis’ settlement that gave the townland its name. Whether mill site or moated homestead, this hidden feature offers a tantalising glimpse into medieval life in North Tipperary, preserved only as subtle variations in crop growth visible from above.