The precise location has been lost, and what survives is little more than a mention, a single line in a seventeenth-century administrative survey that confirms the mill existed without pinning it to any particular bend in a stream or corner of a field.

The reference comes from the Civil Survey of 1654 to 1656, a document compiled on the orders of the Cromwellian administration to record land ownership and resources across Ireland in the aftermath of conquest and plantation. Watermills were common enough features of the medieval and early modern landscape, typically built where a reliable fast-flowing stream could be diverted to turn a millwheel and drive the grinding stones inside. They were valuable assets, noted in surveys precisely because they represented productive capacity, the ability to process grain for a local community or estate. The Hollywood entry records the mill's existence but gives no owner, no precise location, and no description, leaving the site effectively anonymous within the wider parish.

Because the mill has not been precisely located, there is no specific structure or ruin to visit. Hollywood village itself sits in the foothills of the Wicklow Mountains, and the surrounding townlands are cut through by small watercourses that would historically have made mill construction feasible in several spots. Anyone with an interest in early modern land surveys or the archaeology of vernacular industry might find it worth consulting the Civil Survey records directly, which have been published and are accessible through Irish historical archives. The gap in knowledge is itself part of the story here, a reminder that the documentary record can confirm a thing existed while telling almost nothing about where it stood or what became of it.