Ten Little Niggers ... And Then There Were None

From the Wikipedia article And Then There Were None:

And Then There Were None is a mystery novel by the English writer Agatha Christie, who described it as the most difficult of her books to write. It was first published in the United Kingdom by the Collins Crime Club on 6 November 1939, as Ten Little Niggers, after an 1869 minstrel song that serves as a major plot element. The US edition was released in January 1940 with the title And Then There Were None, taken from the last five words of the song. Successive American reprints and adaptations use that title, though American Pocket Books paperbacks used the title Ten Little Indians between 1964 and 1986. UK editions continued to use the original title until 1985.

The image below is of a cover for the sheet music minstrel song "Ten Little Niggers" by Frank Green, published in New York City in 1869.  The irony of "racists" in NYC four years after the so-called Civil War has not escaped us. 

We have an updated version of the lyrics: 
https://boards.christogenea.org/forum/main-category/main-forum/humor/111274-ten-little-niggers

Evidently, there was an older version titled Ten Little Indians.