Robert Kirk (1644–1692) was a Scottish minister, Gaelic scholar, and pioneering folklorist whose legacy rests primarily on his posthumously published treatise, The Secret Commonwealth. Serving as a minister in the Scottish Highlands, Kirk became deeply interested in the local beliefs of his parishioners, particularly regarding fairies, witchcraft, ghosts, and "second sight"—a form of extrasensory perception. His sympathetic documentation of these beliefs was notable for its time, aiming to defend local country folk from accusations of witchcraft by Presbyterian courts.
In the late 1680s, Kirk traveled to London to oversee the publication of one of the first translations of the Bible into Scottish Gaelic. During this period, his work attracted the attention of the prominent natural philosopher Robert Boyle, who financed the Gaelic Bible project and investigated Kirk's accounts of second sight. Kirk died in 1692 before he could publish his own manuscript on supernatural folklore. Following his death, local legends arose claiming that he had not truly died but had instead been carried away to fairyland as punishment for revealing the secrets of the "Good People."
Kirk's manuscript remained unpublished for over a century until the Scottish author Walter Scott printed an edition in 1815. It was later popularized by folklorist Andrew Lang in 1893 under the title The Secret Commonwealth of Elves, Fauns and Fairies. Today, Kirk's work is recognized by modern scholars as one of the most significant historical records of fairy lore and traditional supernatural beliefs in Scotland.
