Wild Mountain Thyme

A folk song written by Francis McPeake, a member of a well known musical family in Belfast, Ireland, and of Scottish origin
McPeake's lyrics are a variant of the song "The Braes of Balquhither" by Scottish poet Robert Tannahill (1774–1810), a contemporary of Robert Burns. 
Tannahill's original song, first published in Robert Archibald Smith's Scottish Minstrel (1821–24), is about the hills (braes) around Balquhidder near Lochearnhead. 
Like Burns, Tannahill collected and adapted traditional songs, and "The Braes of Balquhither" may have been based on the traditional song "The Braes o' Bowhether"....