Ten little Niggers, in American reprints and adaptations were all retitled "And Then There Were None", after the last five words in the nursery rhyme that has a roud folk song index number of what?
And Then There Were None: And Then There Were None is a mystery novel by English writer Agatha Christie, widely considered her masterpiece and described by her as the most difficult of her books to write. And Then There Were None:  It was first published in the United Kingdom by the Collins Crime Club on 6 November 1939, as Ten Little Niggers, after the British blackface song, which serves as a major plot point. And Then There Were None:  The US edition was not released until December 1939; its American reprints and adaptations were all retitled "And Then There Were None", after the last five words in the nursery rhyme "Ten Little Indians". Ten Little Indians: Ten Little Indians is an American children's rhyme. Ten Little Indians:  It has a Roud Folk Song Index number of 13512.
13512