No ruin has been definitively located, no millstone lies in a known ditch. The site exists more as a documentary fact than a physical one, a place confirmed on paper but unconfirmed on the ground.

In 1612, a man named Thomas Petyt, also recorded as Petit, of Irishtown, was granted a water mill in the townland then recorded as Ballynkiny, under the Calendar of Patent Rolls of Ireland for the reign of James I. The grant places the mill firmly in the early seventeenth century, though the phrasing suggests it may already have been an established structure rather than something newly built. There is a further possibility that Mosstown Mill, a later facility in the broader area, was constructed on the footprint of a medieval mill, meaning the milling history of this small corner of Westmeath could stretch back considerably further than 1612. Water mills of the medieval period were typically built to exploit fast-flowing streams, and their sites tended to be reused across generations precisely because a good mill race was not easily improved upon.