Writing in 1902, a local historian named Knox observed something quietly unusual about this site: the focus of devotion was water collected in an artificial hollow carved into a stone, a bullaun stone, rather than any natural source bubbling from the ground. Bullaun stones are boulders or slabs bearing one or more cup-shaped depressions, most likely ground out by human hands, and they appear across Ireland in association with early Christian and pre-Christian ritual. The water that gathered in the hollow was what people came for.

Knox's account, published in 1902, placed the bullaun stone as an integral part of the holy well complex, which was recorded under the name St. Patrick's Well on Ordnance Survey maps from both 1838 and 1919. Those two map appearances suggest the site retained some recognised status across at least eight decades of the nineteenth and early twentieth centuries. By 1998, however, when the site was formally inspected, no trace of the bullaun stone could be found. Whether it was removed, buried, or simply lost to the landscape over the intervening century is not recorded. What remains is the name on old maps, Knox's brief but precise description, and the absence where the stone once sat.