“Pretty Saro” is a previously unreleased Bob Dylan track that was recorded during March 1970 sessions for his album Self Portrait, but ultimately didn’t make the cut. According to Rolling Stone, Dylan’s take on the 18th Century English folk song has never even made it to bootlegs, unscathed for 43 years in the possession of Columbia Records. Now it, along with 34 other alternate takes, demos, and live versions from the Self Portrait and New Morning sessions, will be released in a box set at the end of the month. Check out the collage video below, which was made by filmmaker and previous Dylan collaborator Jennifer Lebeau from images and video stored by the Farm Security Administration in the Library Of Congress.

Another Self Portrait (1969-1971): The Bootleg Series Vol. 10 is out 8/27 via Columbia.