“Fare Thee Well” is an American folk song played by many folk revival musicians such as Pete Seeger, Fred Neil, Bob Dylan, Dave Van Ronk, Kate & Anna McGarrigle, Cisco Houston as well as more recent musicians like Jeff Buckley. The song traditionally tells the story of a woman deserted by her lover when she needs him the most – but Joni’s version is largely about a slave longing for freedom. It’s uncertain where Joni heard this version of the song.

The first historical record of the song was by ethnomusicologist John Lomax in 1909, who recorded it as sung by an African American woman called Dink, as she washed her husband’s clothes in a tent camp of migratory levee-builders on the bank of the Greater Calhoun Bayou River, a few miles from Houston, Texas and the University of Houston.

The first publication of the music was in American Ballads and Folk Songs, edited by Lomax and his son, Alan Lomax, and published by Macmillan in 1934.

*information taken from: http://www.jonimitchell.com