The well dedicated to Saint Helen near Killiane in County Wexford belongs firmly to the second category. Once marked in gothic lettering on the Ordnance Survey six-inch maps of both 1839 and 1925, it now exists as little more than a cartographic memory. Locally it is described as a spring that was filled in and piped into the drainage system, and it was not venerated even before that happened.

A pattern, in Irish tradition, is a localised annual gathering at a sacred site, combining prayer with social occasion, often held on a saint's feast day. At Killiane, that custom had already collapsed well before the first OS surveyors arrived. John O'Donovan, the scholar and Irish-language topographer who travelled the country gathering place-name evidence around 1840, recorded that the pattern here had been abolished around 1810, and that by his time even the date of the gathering had been forgotten. That is a striking detail. Within a single generation, a ritual calendar that would have shaped the local year had dissolved so completely that no one could say when it had been observed. O'Donovan was writing only three decades after the fact, yet the memory had already gone. The well sits on low-lying, level ground roughly 500 metres west of the South Slob, the reclaimed slobland bordering Wexford harbour, a landscape shaped more by drainage works than by devotion. Killiane Castle lies about 80 metres to the north-west, and the remains of a church some 45 metres to the north-east, placing the well within a cluster of sites that together suggest a small but once-active ecclesiastical and secular settlement.