The Secret Commonwealth is a collection of folklore collected between 1691 and 1692 and published in 1815. Folklorist Stewart Sanderson and mythologist
Marina Warner called Kirk's collection of supernatural tales one of the most important and significant works on the subject of fairies and second sight. Historian Michael Hunter believed that "Kirk also saw the value of second sight in vindicating the supernatural against 'atheists'". Kirk probably encountered opposition to his supernatural beliefs in the secular and sceptical climate of 17th-century
coffeehouses in
Restoration London, during his visit in 1689. Kirk collected these stories into a manuscript sometime between 1691 and 1692, but died before it could be published. More than a century would pass before the book was finally released by Scottish author
Walter Scott in 1815 under the title
The Secret Commonwealth or an Essay on the Nature and Actions of the Subterranean (and for the most part) Invisible People heretofore going under the names of Fauns and Fairies, or the like, among the Low Country Scots as described by those who have second sight, 1691. The autograph copy is currently unaccounted for, and published editions rely on one or more of 4 known manuscript copies. Walter Scott's 1815 edition was based on one of these 4 known manuscripts, which he borrowed from the Advocates Library to copy, and which has been missing ever since. The book also contains Kirk's transcript of a letter from
George Mackenzie, Viscount of Tarbat to
Robert Boyle. Folklore scholars consider
The Secret Commonwealth one of the most important and authoritative works on fairy folk beliefs. He describes the fairies as follows:
Andrew Lang published a second edition of the book in 1893, under the title
The Secret Commonwealth of Elves, Fauns and Fairies, followed by a 1933 version with an introduction by
Robert Bontine Cunninghame Graham. Both of these editions were copies of Scott's 1815 edition. Multiple editions of
The Secret Commonwealth have since been published, with notable scholarly analysis by Sanderson, Mario M. Rossi, and
Michael Hunter. Stewart Sanderson edited a new edition for the
Folklore Society in 1976 followed by a contemporary version published by
Robert John Stewart in 1990, with an extensive commentary exploring many of the esoteric themes contained in the text. Michael Hunter edited a new edition in 2001, and
New York Review Books published a new version in 2006 with an introduction by
Marina Warner. Manuscript La.III.551 at the
University of Edinburgh was written in 1692 by Robert Campbell, and is the oldest of the known and accounted for manuscript versions. It is presumably a copy of Kirk's original, and Hunter and Sanderson both relied primarily on it for their scholarly editions of
The Secret Commonwealth. There are also two 18th century manuscript copies of unknown origin, MS. 5022 at the
National Library of Scotland, and MS Gen 308D at the University of Edinburgh. ==Death==