Kilcummin, a headland to the west of Killala Bay, preserves the remains of a religious site, with a church of early date and a graveyard.

(54°16′38″N 9°12′37″W / 54.27713°N 9.21015°W / 54.27713; -9.21015) [1] Cuimín's background is touched upon in a genealogical text compiled by Dubhaltach Mac Fhir Bhisigh (died 1671), who was a member of a learned family from the area around Killala Bay.

A holy well at Kilcummin was believed to have healing powers and served as a central place for the patron held in his honour on the last Sunday of July.

[1][7] The practice came to an end in the first half of the 19th century, when a dean by the name of Lyon had it removed "for certain weighty reasons" and built into the wall of the cathedral at Ballina, County Mayo.

[7] Modern folklore tells that Crom Dubh was the cow which revealed the presence of the saintly child by licking a boat on the shore.