"Memory" is a flash fiction short story by American horror and science fiction writer H. P. Lovecraft, written in 1919 and published in May 1923 in The National Amateur.
This story takes place in the ancient valley of Nis, in vegetation-covered stone ruins described by Lovecraft in great detail. These crumbling blocks of monolithic stone now serve only for grey toads and snakes to nest under. Interspersed in the ruins are large trees that are home to little apes. Through the bottom of this valley runs the great, slimy red river called Than.