 Musically , " Just Like Tom Thumb 's Blues " consists of no chorus , but six verses , varied by a handful of chords and Dylan 's vocal emphasis . Keyboards , drums and vocals provide texture , while Mike Bloomfield plays Latin <unk> fills on electric guitar . The keyboard parts in particular make innovative use of two different pianos , with Al Kooper playing an electric Hohner Pianet and Paul Griffin adding a bar room feel on tack piano . In all but the final verse , the even lines rhyme and the odd lines are unrhymed . In the final verse , however , the odd numbered lines rhyme on " ee " and all the even lines rhyme on " uf . " This change in the rhyming pattern provides a subtle sense of finality to the final two lines : 
