"Like the ten little niggers"
by cm

A reference to Agatha Christie's 1939 novel in which ten characters are killed off one by one.  The book, later retitled And Then There Were None, drew its original title from a nursery rhyme which in turn derives from an 1868 song called "Ten Little Injuns":

Ten little Injuns standin' in a line,

One toddled home and then there were nine;

Nine little Injuns swingin' on a gate,

One tumbled off and then there were eight...

and so on...

Listen on Spotify: Ten Little Indians performed by Harry Nilsson