Not lost in the dramatic sense, not buried under a reservoir or demolished in a well-documented clearance, but simply unlocated, its position on the landscape unconfirmed, its physical remains, if any survive, unidentified. That is the situation with the early mill recorded at Grange in the Newcastle barony of County Dublin, a place that exists in the historical record but refuses to resolve itself into coordinates.

The sole documentary reference comes from Francis Elrington Ball's history of County Dublin, published in 1906, which mentions an early mill at Grange within the pages covering the Newcastle barony area. Ball was a meticulous local historian, and a reference in his work is not something to dismiss lightly. Mills in medieval and early modern Ireland were significant structures, typically built to serve an estate or monastic community, and their placement was determined by reliable water flow, usually along a mill race cut from a nearby stream or river. They were working infrastructure, not ornamental, and their loss from the landscape often came gradually, through abandonment, flood damage, or the simple reuse of stone for later buildings. Grange as a place-name is itself suggestive, deriving from the Latin grangia, meaning a monastic or manorial farm, which hints at an organised agricultural context in which a mill would fit naturally. But beyond Ball's passing mention, the record goes quiet.

For anyone curious enough to look, Grange lies within the Newcastle barony in south County Dublin, a stretch of countryside with a reasonable density of early medieval and later historic sites. There is nothing to visit here in the conventional sense, no structure to locate, no interpretive panel, no visible earthwork. What remains is the question itself, and for a certain kind of visitor, that absence is the point. Consulting Ball's 1906 volume directly is the most productive approach, and local and county archive collections may hold estate maps or land surveys that could yet narrow the search. The compiled note was uploaded in August 2011 by Geraldine Stout, and the location remains, as recorded then, unknown.