Yet this is St Lachtaín's holy well at Cloch Eidhneach, a site that once drew people from across the parish every year on the 19th of March, the feast day of its patron saint. The well sits roughly twenty-five metres west of the boundary of St Lachtaín's burial ground, and the water, once collected, runs off to the southwest as a small stream.

Writing in 1898, the local historian Murphy placed the well a few yards due west of where pillar stones had marked the western entrance to the burial ground, a detail that helps anchor it within a wider complex of early Christian remains. An earlier account, from 1897, records that St Lachtaín's feast day was observed with a pilgrimage to his wells in the parish, suggesting more than one sacred water source was associated with the saint. Also once located near the well were two bullaun stones, large boulders bearing artificial cup-shaped hollows that are typically associated with early ecclesiastical sites and were sometimes used for grinding or ritual purposes. Both stones have since been moved to Reananarree Roman Catholic church. The well itself appears on the Ordnance Survey six-inch map of 1940, though its origins are considerably older than that cartographic record implies.