The interest here lies less in what survives than in the paper trail left by something that has almost entirely vanished, and in the quiet puzzle of what it ever actually was.

In the 1930s, a Captain D. B. O'Connell noted a feature he called a "slag mount" in Churchtown, logging it with the Kerry Archaeological Survey. He returned to it in a 1939 publication on ancient mines in the area, describing it as a "curious site" on the lands of a Mr T. Foley, though he stopped short of a firm identification. The detail that complicates things is that Ordnance Survey six-inch maps from both 1846 and 1894 mark a limekiln in the immediate vicinity of where O'Connell placed his mysterious feature. A limekiln is a stone or brick furnace used to burn limestone and produce quicklime, widely used in agriculture and construction across rural Ireland, and the accumulated ash and waste from one could plausibly resemble a slag mound to a passing observer. Whether O'Connell was looking at industrial residue from a fairly ordinary piece of rural infrastructure, or something older beneath it, was never resolved. Today, no visible remains can be found on the ground.