Appearing twice on the Bookends album, this piece was used as a link and helps to create a sense of unity in this classic record. The first (and very brief) instrumental version is a simple, acoustic guitar reading of the melody, stating its theme and feel. The second version features the vocals of Simon & Garfunkel and has been used in countless films and television shows that are set in the 1960s. Capturing the innocence of the era perfectly, the lyrics also have the distinction of looking back with a sense of wistful melancholy. This is most interesting when you consider that the song was written in 1967. Simple, effective, and wholly effecting, its one of Paul Simon's classics.