“Wild Mountain Thyme” (also known as “Purple Heather” and “Will Ye Go, Lassie, Go?”) is a Scottish/Irish folk song. The lyrics and melody are a variant of the song “The Braes of Balquhither” by Scottish poet Robert Tannahill (1774–1810) and Scottish composer Robert Archibald Smith (1780–1829), but were adapted by Belfast musician Francis McPeake (1885–1971) into “Wild Mountain Thyme” and first recorded by his family in the 1950s. 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 Robert Burns, Tannahill collected and adapted traditional songs, and “The Braes of Balquhither” may have been based on the traditional song “The Braes o’ Bowhether”.