What makes this site unusual is not dramatic ruins or a well-preserved wheel race, but rather the layered nature of the evidence itself, a series of historical snapshots that suggest continuous industrial activity at this spot across several hundred years, without any single source telling the full story.

The earliest written reference comes from the terrier, essentially a written inventory of lands and their features, that accompanies the Down Survey map of 1655 to 1656. That document records "Two Double mills and a Single mill in repaire" at Kilmainham, suggesting a functioning and reasonably substantial milling operation at the time. The Down Survey was a remarkable mid-seventeenth-century project to map forfeited Irish lands in detail, and its accompanying terriers are among the most granular land records from the period. By 1673, Gomme's map of the city and suburbs of Dublin was marking a mill at Old Kilmainham, placing the site cartographically for the first time. Then, on the first edition Ordnance Survey six-inch map of 1837, a structure is recorded at what may be the same location, this time labelled as a flour mill. Whether these references describe one evolving site or a succession of different structures is not fully resolved, but the geographical consistency across nearly two centuries of mapping is suggestive.

Kilmainham today is dense with other historical associations, the gaol, the Royal Hospital, the river path along the Camac and Liffey, and the milling site does not announce itself. The area around Old Kilmainham village, close to where the Camac flows into the Liffey, is the general focus of the historical references. Visitors interested in the industrial archaeology of Dublin's inner suburbs will find this a rewarding area to walk slowly, with the OS historical map layers available through the Tailte Éireann geoportal offering a useful way to cross-reference what was once recorded here against what survives at ground level.