Ballantine, New York, April 1971, 1^st thus.  ISBN 0-345-02206-8.  MMPB, 205 pages including Notes on the Commoriom Myth-Cycle by Lin Carter.  Good plus; wraps show some cover wear, corner bends, reading creases on and along spine; binding tight with a lean; outer page block tinted orange.  Interior clean and unmarked with tanned pages and very occasion age spot; black & white map.  ‘Hyperborea is a collection of fantasy short stories by Clark Ashton Smith, edited by Lin Carter. … The book collects one prose poem and ten tales of the author’s Hyperborean cycle, set on a prehistoric lost northern continent Smith named for the mythological land of Hyperborea with an introduction and map by Carter. … The editor also includes in the collection four additional tales of Smith’s from what he took to be a similar but more fragmentary sequence of stories. (from Wikipedia)