At Killinarden in County Dublin, the evidence is thinner still, amounting to little more than a cautious footnote and a small watercourse that has kept flowing regardless.

Louth historian Liam Price, writing in 1944, noted the possible existence of a mill at Killinarden as early as 1290. Mills of this period were typically horizontal- or vertical-wheel structures built to grind grain, and they were among the most economically significant buildings a medieval settlement could possess, often held by manorial lords and leased to local communities for a fee. Price placed the site tentatively beside the small stream that runs near Killinarden House, which in practical terms makes sense: a reliable water source, even a modest one, was the first requirement for any mill builder. The reference is brief and qualified, however, and no physical remains appear to have been identified.

Killinarden House and its surrounding lands lie in the Tallaght area of south County Dublin, now largely absorbed into suburban development. The stream Price associated with the mill still runs through the area, though tracing it on the ground requires some patience given the changed character of the landscape. There is nothing here for a visitor expecting ruins or interpretation panels. What the site offers instead is the quieter experience of reading a working landscape against an old record, standing beside a stream that may once have been diverted and dammed for a purpose that left almost no trace, and finding that the absence of evidence can itself say something about how lightly the medieval period sits on some parts of the Irish countryside.