This one, a small clear spring set in a shallow hollow amid drystone work in a bracken-covered glen in north Kerry, operates under a rather more exclusive arrangement. According to local tradition, the ritual rounds at the well, the prescribed circling and prayer that form the devotional practice at such sites, may only be performed by members of the Corridan family. The same family holds the reserved right of burial in the ruined church that stands nearby. In return, or perhaps simply as a consequence, the well is said to cure all diseases.

The site appears on Ordnance Survey maps as far back as 1841-42 under the name St Macadaw's Well, and again on the 1916 edition, though it is also known locally as St Brigid's Well. Its Irish name, Cill Mhic Adá, points to an early ecclesiastical connection. Folklore gathered from Booleenshare School captures something of the atmosphere the place carried in living memory: a deep glen to the south of the old ruin, covered with bracken and ivy, a grassy slope from which the stream issues. The same account describes a recurring omen attached to the Corridan family specifically: the old church is sometimes seen enveloped in a bright light, understood as a forewarning of a family death. The schoolchildren's account is precise on this point, noting that a funeral has followed the light's appearance in every recorded case. Stranger still, a sound of weeping and the Irish caoine, the traditional keening lament for the dead, is said to be heard at the site when a Corridan dies overseas, the grief travelling somehow to the ancestral ground even when the body cannot.