he knew all their favorite songs : sad ones like `` the day they hanged black robin , '' `` the mermaid 's lament , '' and `` autumn of my day , '' rousing ones like `` iron lances '' and `` seven swords for seven sons , '' bawdy ones like `` milady 's supper , '' `` her little flower , '' and `` meggett was a merry maid , a merry maid was she . ''