That ambiguity alone sets this site apart. Most mill sites in Ireland can be traced to a ruin, a millstone left in a field, or at least a townland name that gives something away. The Turvey mill offers none of that with any certainty.

The evidence for its existence rests on a single cartographic source: John Rocque's detailed map of County Dublin, surveyed and published in 1760. Rocque, a Huguenot-born cartographer working in Britain and Ireland during the mid-eighteenth century, produced some of the most precise maps of his era, and his County Dublin sheet is considered a reliable record of the landscape as it then stood. A mill is marked at Turvey, in the barony of Balrothery East, and the notation suggests it was a tidal mill rather than a conventional river-fed one. Tidal mills work by trapping seawater in a millpond at high tide, then releasing it through a sluice gate to turn a wheel as the tide ebbs, a method used at coastal sites around Ireland and Britain from medieval times onward. The detail was noted by archaeologist Geraldine Stout, who compiled the record in August 2011, though even she noted the site has not been precisely located on the ground.

For anyone curious enough to look, Turvey sits near the coast between Donabate and Lusk in north County Dublin, an area of low-lying farmland close to the Broadmeadow estuary. The landscape is quiet and largely agricultural, with little to immediately suggest an industrial past. There is no marked trail or interpretive sign pointing toward the mill's likely position, and without precise coordinates, any search would amount to reading the terrain for clues: a depression that might once have been a millpond, a subtle change in the field boundaries, or an old watercourse that no longer carries water. Rocque's map can be consulted online through the Dublin City Library and Archive, and overlaying it with modern mapping tools is perhaps the closest a curious visitor can currently get to standing where the mill once stood.