Macaulay, in his “History of St. Kilda” published in 1764, describes a spring there called by the inhabitants Toberi-Clerich, the cleric in question being, according to him, Columba. “This welI,” he says, “is below the village, . . . and gushes out like a torrent from the face of a rock. At every full tide the sea overflows it, but how soon that ebbs away, nothing can be fresher or sweeter than the water. It was natural enough for the St. Kildians to imagine that so extraordinary a phenomenon must have been the effect of some supernatural cause, and one of their teachers would have probably assured them that Columba, the great saint of their island and a mighty worker of miracles, had destroyed the influence which, according to the established laws of nature, the sea should have had on that water,” This spring resembles one in the parish of Tain, in Ross-shire, known as St. Mary’s Well. The latter is covered several hours each day by the sea, but when the tide retires its fresh, sweet water gushes forth again.
MacAulay The History of St Kilda 1764