No basin, no stonework, no votive offerings on a nearby thorn bush. Whatever marked the spot has been swallowed by time, erosion, or both, leaving behind only a name and a location that places it at one of the more precarious addresses in Irish sacred geography.

The well was recorded by Coleman in 1894 as Tobar a Sillee, or Tobar a Sellee, a name that resists easy translation but whose first element, tobar, is simply the Irish word for well, the standard term applied to the hundreds of springs across Ireland that acquired religious significance in early Christian and pre-Christian times. Holy wells were typically associated with a local saint or a pattern day, an annual gathering for prayer and sometimes more secular festivities, though no such detail has been preserved here. What survives is the Coleman reference, the cliff-edge location on the southern shore of Great Island, and not much else. Great Island is the landmass on which Cobh, formerly Queenstown, sits, separated from the Cork mainland by channels of the harbour, which means this well once stood above one of the most historically trafficked stretches of water in Ireland.

There is no surface trace remaining, so a visitor hoping to find a physical site would almost certainly be disappointed. The cliff edge itself is the only honest landmark, and the story here is less about what can be seen than about what the place once was, a named and presumably venerated spot that has since dissolved back into the landscape.