"The Seal of R'lyeh" is a short story by August Derleth, first published in 1957 under the title "The Seal of the Damned" in the July 1957 issue of Fantastic Universe Science Fiction.2 It was later included in the 1962 collection "The Mask of Cthulhu". The story is part of the Cthulhu Mythos and involves themes of good versus evil. In "The Seal of R'lyeh," Derleth suggests that R'lyeh, the sunken city where Cthulhu is imprisoned, might be an enormous ring-shaped sunken continent that extends from the South Pacific all the way to the Atlantic coast of Massachusetts.
