The superstitions of the Arran people are deeply imbued with the legends of fairy mythology. The perforated column of “Fion=gal’s Cauldron Seat,” on the Mauchrie Moor, was believed to contain a fairy or brownie, who could only be propitiated by the pouring of milk through the hole bored in the side of the stone.
p67 of ‘The Antiquities of Arran’ (1861) by John McArthur.