“In 1968 I was working with Broadway director Jacques Levy on a country-rock musical based on Ibsen’s “Peer Gynt.” The lead character goes off looking for the truth, and it takes him out to the Wild West in 1840, following this horse. He’s been looking for this horse for a number of weeks, and one day he sees it off in the distance. And this is the song that he sings. It’s part of the play.” Roger McGuinn