Samuel Johnson (2010). “Journey to the Hebrides: A Journey to the Western Islands of Scotland & The Journal of a Tour to the Hebrides”, p.198, Canongate Books
Jesse Torrey (1819). “The Moral Instructor, and Guide to Virtue and Happiness: Being a Compendium of Moral Science, in Four Parts ... : with an Appendix Containing Directions for the Institution of Free Public Libraries, and Reading Societies : Designed for the Use of Families, and the Highest Classes in Common Schools and Academies”, p.186