The friendship of Clark Ashton Smith and Howard Phillips Lovecraft began in letters in 1922 and progressed over the years as each became famous to the readers of Weird Tales and other pulps of the 1920s and '30s. It began with Lovecraft, having been shown a few of Smith's poems by another friend, writing to Smith, and it continued up to Lovecraft's death — the manuscript of his poem, "To Clark Ashton Smith, Esq., upon His Fantastic Tales, Verses, Pictures, and Sculptures", was found on HPL's desk, apparently the last non-letter item HPL ever wrote. (This is the poem that's also appeared as "To Klarkash-Ton, Lord of Averoigne".)
HPL was attracted to CAS's poetic style, transmundane focus, and sardonic wit. CAS liked HPL's sweeping vistas of time and space and his personal philosophy of what's been called "cosmic indifferentism": the belief that humanity is no more significant in the universe than a grain of sand, a blade of grass, or a solar flare. HPL encouraged CAS to try his hand at fiction, and the two were soon passing drafts of stories back and forth for comment.
It is not unusual for authors to create a series of tales using the same protagonist, or set in the same fictional land, but it was unusual in CAS's day for one author to make use of another's protagonist, land, or what-have-you — at least, it was unusual to do so while the source author was still alive and writing. Lovecraft combined his own creations with those borrowed from "past" authors, such as Lord Dunsany, Ambrose Bierce, and Robert W. Chambers, and, through his friendship with Smith, Robert E. Howard, and others, with those borrowed from contemporary authors as well. This was all to give his stories a grander sweep and deeper illusion of verisimilitude. Thus was created the linked set of stories and poems we today call "The Cthulhu Mythos".
The Cthulhu Mythos is a name given to the collected works, both prose and poetry, about a set of alien beings, invented by H. P. Lovecraft, his friends, and his admirers. It is what is today termed a "shared world": a number of writers use some of the same settings, characters, objects, and concepts in otherwise unrelated stories (i.e., it's not necessarily a series, though some series have been set in the Mythos). Most often, these are horror stories, though the Mythos does include science fiction, high fantasy, sword-and-sorcery, and, in at least two cases, mainstream fiction.
In the world of the Cthulhu Mythos, alien beings known to us only as as the Great Old Ones came to this planet eons ago and ruled. Through unknowable events (some claim a cosmic war with opposing entities, some merely a time of rest), these beings lost their hold and are now either asleep, somehow restricted to certain areas, or located elsewhere in time and space. Here on Earth, primal memories of these beings gave birth to many of humanity's diverse mythologies, and the Great Old Ones were revered as gods. As always, there were those who would exchange their very souls for a taste of terrestrial power, and who dared to record their rites in blasphemous books, and so the worship of the Great Old Ones began and continues in secrecy to this day. Occasionally, an innocent learns the horrendous truths behind the sheer veil of reality and glimpses the ultratelluric chasms that exist, unknown to most, beneath our mundane existence. The Cthulhu Mythos stories chronicle the adventures of such unfortunates, frequently in as high-blown a style as that used in the latter sentences of this paragraph.
As you can see, HPL's borrowings were not a one-way street. He encouraged his friends to use what they wished of his own "modest efforts" in their stories. It was like a game, and his friends played, too.
CAS had his own story cycles: tales set in medieval Averoigne, in legendary Atlantis and Poseidonis, in the far future on the last continent Zothique, in the distant past in ice-beset Hyperborea, on a future Mars, and on the planet Xiccarph, or tales involving the artist Philip Hastane or Captain Volmer of the spaceship Alcyone. Critics often like to make nice, neat piles of separate story-cycles in an author's oeuvre, so that a "Hastane story" is distinct from a "Zothique story". But some authors, especially in the Cthulhu Mythos, have not always drawn such clear distinctions in their own minds. Smith himself "entangled" some of his own cycles, so that the Hyperborean deity Tsathoggua is known in Averoigne. Lovecraft then mixed the Averoigne/Hyperborea tales with his own, and Smith wrote tales using, for example, HPL's Necronomicon and Robert E. Howard's Serpent-People.
Since the game of the Cthulhu Mythos continued after Lovecraft's death, later authors have also made reference to Smith story-cycles in Mythos stories — August Derleth brought in Zothique, Ramsey Campbell the Martian/Aihai stories, Lin Carter the Xiccarph and Hastane tales — so that, today, all of Smith's cycles except the Volmer stories may be considered to be in the Mythos. (Lest readers feel this to be a violation of an author's wishes, they should realize there is a CAS text fragment, "The Infernal Star", that combines references to most of Smith's own cycles, so that the thought was not entirely alien to him.)
It has been my pleasure to compile a listing of Cthulhu Mythos stories, along with the "mentions" of terms that link them to the Mythos, and I here present the Smith-related portion of that work. (Those interested in the larger Mythos bibliography should check out the publically accessible copy at http://sflovers.rutgers.edu/archive/bibliographies/cthulhu-mythos.txt People interested in a more detailed treatment of CAS's contributions to the Mythos should look for Will Murray's article, "The Clark Ashton Smythos", which originally appeared in Crypt of Cthulhu #23 and which has been reprinted in Robert M. Price's The Horror of It All.
I hope the following information leads you to seek out the work of Clark Ashton Smith.
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Clark Ashton Smith, "The Muse of Atlantis", in Ebony and Crystal: Poems in Verse and Prose, Auburn, CA: Clark Ashton Smith, 1922. Mentions Atlantis.
Clark Ashton Smith, "The End of the Story", Weird Tales, Vol. 15, No. 5, May 1930. Mentions Averoigne, France; Perigon; Vyones, France; Chateau des Faussesflammes; Lamias.
Clark Ashton Smith, "The Last Incantation", Weird Tales, Vol. 15, No. 6, June 1930. Mentions Poseidonis; Malygris; Hyperborea; Susran.
Clark Ashton Smith, "The Uncharted Isle", Weird Tales, Vol. 16, No. 5, November 1930. Mentions Lemuria; Mu.
Clark Ashton Smith, "A Rendezvous in Averoigne", Weird Tales, Vol. 17, No. 3, April-May 1931. Mentions Averoigne, France; Vyones, France; La Frênaie, France; Chateau des Faussesflammes; Vampires.
Clark Ashton Smith, "The Satyr", La Paree Stories, July 1931. Mentions Averoigne, France; La Frênaie, France; Satyrs.
Clark Ashton Smith, "The City of the Singing Flame", Wonder Stories, July 1931. Mentions Hastane, Philip; Singing Flame; Angarth, Giles; Ebbonly, Felix; Ydmos.
Clark Ashton Smith, "A Voyage to Sfanomoë", Weird Tales, Vol. 18, No. 1, August 1931. Mentions Poseidonis; Sfanomoë (Venus); Antillia; Moaria; Moon; Atlantis; Lephara.
Clark Ashton Smith, "The Return of the Sorcerer", Strange Tales, September 1931. Mentions Necronomicon; Carnby, John; Al Azif; Ghouls.
Clark Ashton Smith, "The Tale of Satampra Zeiros", Weird Tales, Vol. 18, No. 4, November 1931. Mentions Tsathoggua; Satampra Zeiros; Tirouv Ompallion; Uzuldaroum; Hyperborea; Commoriom; Lemuria; Polarion; White Sybil; Black Slime.
Clark Ashton Smith, "Beyond the Singing Flame", Wonder Stories, November 1931. Mentions Hastane, Philip; Singing Flame; Angarth, Giles; Ebbonly, Felix; (Ydmos).
Clark Ashton Smith, "The Door into Saturn", Strange Stories, January 1932. Mentions Cykranosh (Saturn); Eibon; Zhothaqquah (Tsathoggua); Yhoundeh; Mhu Thulan; Hziulquoigmnzhah; Hyperborea; Bhlemphroims; Vhlorrh; Ydheems; Djhenquomh; Djhibbis; Ghlonghs; Ghlomph.
Clark Ashton Smith, "The Vaults of Yoh-Vombis", Weird Tales, Vol. 19, No. 5, May 1932. Mentions Aihais; Mars; Yoh-Vombis; Ignarh; Venus; Yorhis; Leeches of Yoh-Vombis; Necromantic Ones.
Clark Ashton Smith, "The Nameless Offspring", Strange Tales, June 1932. Mentions Ghouls; Necronomicon; Alhazred, Abdul.
Clark Ashton Smith, "The Weird of Avoosl Wuthoqquan", Weird Tales, Vol. 19, No. 6, June 1932. Mentions Tsathoggua; Commoriom; Hyperborea; Mhu Thulan; Tscho Vulpanomi.
Clark Ashton Smith, "The Maker of Gargoyles", Weird Tales, Vol. 20, No. 2, August 1932. Mentions Averoigne, France; Vyones, France; Cordeliers; La Frênaie, France.
Clark Ashton Smith, "The Empire of the Necromancers", Weird Tales, Vol. 20, No. 3, September 1932. Mentions Zothique; Cincor; Naat; Tinarath.
Clark Ashton Smith, "The Hunters from Beyond", Strange Tales, October 1932. Mentions Hastane, Philip; Sincaul, Cyprian; Hunters from Beyond.
Clark Ashton Smith, "The Testament of Athammaus", Weird Tales, Vol. 20, No. 4, October 1932. Mentions Tsathoggua; Voormis; Commoriom; Uzuldaroum; Hyperborea; Atlantis; Mu; Mhu Thulan; Tscho Vulpanomi; Knygathin Zhaum; Eiglophian Mountains.
Clark Ashton Smith, "The Ice-Demon", Weird Tales, Vol. 21, No. 4, April 1933. Mentions Hyperborea; Tsathoggua; Iqqua; Mhu Thulan; Polarion; Oggon-Zhai; Ommum-Vog; Uzuldaroum.
Clark Ashton Smith, "The Devotee of Evil", in The Double Shadow and Other Fantasies, Auburn, CA: Clark Ashton Smith, 1933. Mentions Hastane, Philip; Averaud, Jean.
Clark Ashton Smith, "The Maze of Maal Dweb" (as "The Maze of the Enchanter"), in The Double Shadow and Other Fantasies, Auburn, CA: Clark Ashton Smith, 1933. Mentions Athlé; Maal Dweb; Xiccarph.
Clark Ashton Smith, "The Double Shadow", in The Double Shadow and Other Fantasies, Auburn, CA: Clark Ashton Smith, 1933. Mentions Poseidonis; Malygris; Susran; Atlantis; Thule; Mu; Mayapan; Serpent-People; Hyperborea; Lemuria.
Clark Ashton Smith, "The Voyage of King Euvoran", in The Double Shadow and Other Fantasies, Auburn, CA: Clark Ashton Smith, 1933. Mentions Zothique; Ustaim; Sotar; Geol; Xylac; Tosk; Yumatot; Ornava; Ullotroi.
Clark Ashton Smith, "The Mandrakes", Weird Tales, Vol. 21, No. 2, February 1933. Mentions Averoigne, France; Grenier, Gilles; Isoile.
Clark Ashton Smith, "The Isle of the Torturers", Weird Tales, Vol. 21, No. 3, March 1933. Mentions Zothique; Yoros; Silver Death; Achernar; Cyntrom; Tasuun; Indaskian Sea; Uccastrog.
Clark Ashton Smith, "The Dweller in the Gulf" (as "Dweller in Martian Depths"), Wonder Stories, March 1933. Mentions Aihais; Yorhis; Dweller; Mars.
Clark Ashton Smith, "The Beast of Averoigne", Weird Tales, Vol. 21, No. 5, May 1933. Mentions Averoigne, France; Ximes, France; Sainte Zenobia; Perigon; Chateau des Faussesflammes; Isoile; La Frênaie, France; Vyones, France; Beast of Averoigne; Atlantis; Hyperborea; Eibon.
Clark Ashton Smith, "Ubbo-Sathla", Weird Tales, Vol. 22, No. 1, July 1933. Mentions Eibon; Ubbo-Sathla; Zhothaqqua (Tsathoggua); Yok-Zothoth (Yog-Sothoth); Kthulhut (Cthulhu); Hyperborea; Book of Eibon; Necronomicon; Zon Mezzamalech; Mhu Thulan; Elder Tablets; Elder Gods; Serpent-People; Crystal of Zon Mezzamalech.
Clark Ashton Smith, "A Vintage from Atlantis", Weird Tales, Vol. 22, No. 3, September 1933. Mentions Atlantis; Dwale, Capt. "Red" Barnaby.
Clark Ashton Smith, "The Holiness of Azéderac", Weird Tales, Vol. 22, No. 5, November 1933. Mentions Averoigne, France; Tsathoggua; Yog-Sothoth; Azéderac; Dagon; Ximes, France; (Great) Old Ones; Vyones, France; Book of Eibon; Eibon; Hyperborea; La Frênaie, France; Druids.
Clark Ashton Smith, "The White Sybil", in Science & Fantasy Booklet Number One, William Crawford, ed., Everett, PA: Fantasy Publications, 1934. Mentions Hyperborea; Mhu Thulan; Cerngoth; Commoriom; Tscho Vulpanomi; Mu; Antillia; Polarion; White Sybil.
Clark Ashton Smith, "The Ghoul", The Fantasy Fan, January 1934. Mentions Ghouls; Vathek. Lin Carter considered this to be part of the Necronomicon, based on a letter from HPL to CAS (11/18/30). If so, William Beckford's Vathek may also be connected to the Mythos.
Clark Ashton Smith, "The Weaver in the Vault", Weird Tales, Vol. 23, No. 1, January 1934. Mentions Zothique; (Grey Weavers); Tasuun; Chaon Gacca; Xylac; Yuckla; Yoros; Zul-Bha-Sair; Weaver; Famorgh; Lunalia; Miraab.
Clark Ashton Smith, "The Witchcraft of Ulua", Weird Tales, Vol. 23, No. 2, February 1934. Mentions Tasuun; Zothique; Famorgh; Lunalia; Ulua; Dooza Thom.
Clark Ashton Smith, "The Charnel God", Weird Tales, Vol. 23, No. 3, March 1934. Mentions Zothique; Zul-Bha-Sair; Mordiggian; Ghouls; Xylac; Yoros; Tasuun.
Clark Ashton Smith, "The Death of Malygris", Weird Tales, Vol. 23, No. 4, April 1934. Mentions Poseidonis; Malygris; Susran; Atlantis; Taaran.
Clark Ashton Smith, "The Tomb-Spawn", Weird Tales, Vol. 23, No. 5, May 1934. Mentions Zothique; Yoros; Ossaru; Thasaidon; Nioth Korghai; Cincor; Namirrha; Tasuun; Ustaim; Ghorii.
Clark Ashton Smith, "The Muse of Hyperborea", The Fantasy Fan, June 1934. Mentions Hyperborea.
Clark Ashton Smith, "The Colossus of Ylourgne", Weird Tales, Vol. 23, No. 6, June 1934. Mentions Averoigne, France; du Nord, Gaspard; Vyones, France; Nathaire; Ylourgne; Isoile; La Frênaie, France; Ximes, France; Perigon; Sainte Zenobia, France.
Clark Ashton Smith, "The Epiphany of Death", The Fantasy Fan, July 1934. Mentions Ptolemides; Hyperborea; Mu; Atlantis.
Clark Ashton Smith, "The Disinterment of Venus", Weird Tales, Vol. 24, No. 1, July 1934. Mentions Averoigne, France; Perigon; Sainte Zenobia; Vyones, France.
Clark Ashton Smith, "The Seven Geases", Weird Tales, Vol. 24, No. 4, October 1934. Mentions Abhoth; Atlach-Nacha; Haon-Dor; Hyperborea; Serpent-People; Voormithadreth, Mt.; Commoriom; Saturn; (Great) Old Ones; Archetypes; Eiglophian Mountains; Tsathoggua; Voormis.p
Clark Ashton Smith, "Xeethra", Weird Tales, Vol. 24, No. 6, December 1934. Mentions Carnamagos; Zothique; The Testaments of Carnamagos; Xeethra; Thasaidon; Cincor; Calyz; Sha-Karag.
Clark Ashton Smith, "The Dark Eidolon", Weird Tales, Vol. 25, No. 1, January 1935. Mentions Xylac; Thasaidon; Hyperborea; Mu; Poseidonis; Tasuun; Yoros; Zul-Bha-Sair; Mordiggian; Tinarath; Uccastrog; Cyntrom; Thamogorgos; Namirrha; Ummaos; Naat; Sotar; (Aforgomon?); Xeethra; Zothique.
Clark Ashton Smith, "The Last Hieroglyph", Weird Tales, Vol. 25, No. 4, April 1935. Mentions Ummaos; Vergama; Xylac; Yoros; Zul-Bha-Sair; Zothique.
Clark Ashton Smith, "The Flower-Women", Weird Tales, Vol. 25, No. 5, May 1935. Mentions Xiccarph; Maal Dweb; Athlé; Mornoth; Ulassa; Nouph; Rhul; Votalp; Ispazars.
Clark Ashton Smith, "The Treader of the Dust", Weird Tales, Vol. 26, No. 2, August 1935. Mentions Carnamagos; Quachil Uttaos; The Testaments of Carnamagos.
Clark Ashton Smith, "Vulthoom", Weird Tales, Vol. 26, No. 3, September 1935. Mentions Aihais; Mars; Vulthoom; Ignarh-Vath; Ravormos; Ta-Vho-Shai; Ignarh.
Clark Ashton Smith, "The Chain of Aforgomon", Weird Tales, Vol. 26, No. 6, December 1935. Mentions Aforgomon; Atlantis; Kalood; Hestan; Xexanoth.
Clark Ashton Smith, "The Black Abbot of Puthuum", Weird Tales, Vol. 27, No. 3, March 1936. Mentions Ilcar; Izdrel; Ojhal; Yoros; Zothique.
Clark Ashton Smith, "Necromancy in Naat", Weird Tales, Vol. 28, No. 1, July 1936. Mentions Zothique; Sha-Karag; Naat; Xylac.
Clark Ashton Smith, "The Death of Ilalotha", Weird Tales, Vol. 30, No. 3, September 1937. Mentions Ludar; Ludar's Litany to Thasaidon; Tasuun; Thasaidon; Zothique.
Clark Ashton Smith, "The Garden of Adompha", Weird Tales, Vol. 31, No. 4, April 1938. Mentions dedaim; Ludar; Ludar's Litany to Thasaidon; Sotar; Thasaidon; Zothique.
Clark Ashton Smith, "Mother of Toads", Weird Tales, Vol. 32, No. 1, July 1938. Mentions Averoigne, France; Les Hiboux, France.
Clark Ashton Smith, "The Coming of the White Worm", Stirring Science Stories, April 1941. Mentions Eibon; Evagh; Hyperborea; Mhu Thulan; Rlim Shaikorth; Cerngoth; Pnom; Exorcisms of Pnom; Yarak; (Great) Old Ones; Yikilth; Thulask; Polarion; Leqquan; Aguil; (Book of Eibon).
Clark Ashton Smith, "The Enchantress of Sylaire", Weird Tales, Vol. 35, No. 10, July 1941. Mentions Averoigne, France; Druids; Isoile; Sephora; Werewolves.
Clark Ashton Smith, "The Family Tree of the Gods", The Acolyte, No. 7, Summer 1944. Mentions Tsathoggua; Parchments of Pnom; Pnom; Elder Script; Azathoth; Hziulquoigmnzhah; Ghizguth; Cxaxukluth; Knygathin Zhaum; Voormis; Commoriom; Ech-Pi-El; Cthulhu; Zstylzhemgni; Yuggoth; Yaksh (Neptune); Cykranosh (Saturn); N'kai; Yoth; K'n-yan; Zamacona y Nuñez, Pánfilo de; Ycnagnnisssz; Zoth; Shathak; Zvilpogghua; Sfaticllp.
Clark Ashton Smith, "The Master of the Crabs", Weird Tales, Vol. 40, No. 3, March 1948. Mentions Zothique; Naat; Iribos; dedaim; Basatan.
Clark Ashton Smith, "Zothique", in The Dark Chateau and Other Poems, Sauk City, WI: Arkham House, 1951. Poem. Mentions Zothique.
Clark Ashton Smith, "Morthylla", Weird Tales, Vol. 45, No. 2, May 1953. Mentions Lamias; Morthylla; Psiom; Umbri; Zothique.
Clark Ashton Smith, "An Offering to the Moon", Weird Tales, Vol. 45, No. 4, September 1953. Mentions Mu; Rhalu.
Clark Ashton Smith, "Tolometh", in Spells and Philtres, Sauk City, WI: Arkham House, 1958. Poem. Mentions Poseidonis; Tolometh.
Clark Ashton Smith, "The Theft of Thirty-Nine Girdles" (as "The Power of Hyperborea"), Saturn Science Fiction and Fantasy, March 1958. Mentions Hyperborea; Satampra Zeiros; Uzuldaroum; Leniqua.
Clark Ashton Smith, "Atlantis", in Selected Poems, Sauk City, WI: Arkham House, 1971. Poem. Mentions Atlantis.
Clark Ashton Smith, "In Lemuria", in Selected Poems, Sauk City, WI: Arkham House, 1971. Poem. Mentions Lemuria.
Clark Ashton Smith, "Ascharia" (as "Asharia"), Crypt of Cthulhu, No. 27, Hallowmas 1984. Outline and fragment. Mentions Ascharia; Lemuria; Mhaggalok (Jupiter?); Mhuth (Mars?); Mu; Roiba (Venus?).
Clark Ashton Smith, "The House of Haon-Dor", Crypt of Cthulhu, No. 27, Hallowmas 1984. Fragment. Mentions Haon-Dor.
Clark Ashton Smith, "Shapes of Adamant", Crypt of Cthulhu, No. 27, Hallowmas 1984. Fragment. Mentions Avandas; Dooza Thom; Nooth-Kemmor; Poseidonis; Zothique.
Clark Ashton Smith, "Mandor's Enemy", Crypt of Cthulhu, No. 27, Hallowmas 1984. Fragment. Mentions Famorgh; Tasuun; (Zothique).
Clark Ashton Smith, "The Sorceress of Averoigne/The Tower of Istarelle", Crypt of Cthulhu, No. 27, Hallowmas 1984. Synopsis for unwritten story. Mentions Averoigne, France; Vyones, France.
Clark Ashton Smith, "The Feet of Sidaiva", Crypt of Cthulhu, No. 27, Hallowmas 1984. Synopsis for unwritten story. Mentions Ummaos; Zothique; Zylac, Zothique (Xylac).
Clark Ashton Smith, "Queen of the Sabbat", Crypt of Cthulhu, No. 27, Hallowmas 1984. Synopsis for unwritten story. Mentions Averoigne, France; La Frênaie, France.
Clark Ashton Smith, "The Hyperborean City", Crypt of Cthulhu, No. 27, Hallowmas 1984. Synopsis for unwritten story. Mentions Hyperborea.
Clark Ashton Smith, "The Werewolf of Averoigne", Crypt of Cthulhu, No. 27, Hallowmas 1984. Synopsis for unwritten story. Mentions Averoigne, France; Werewolves.
Clark Ashton Smith, "The Rebirth of the Flame", Crypt of Cthulhu, No. 27, Hallowmas 1984. Synopsis for unwritten story. Mentions Angarth, (Giles); Hastane, (Philip); Singing Flame; Ydmos.
Clark Ashton Smith, "Conclusion to 'The Return of the Sorcerer'", Klarkash-Ton, No. 1, June 1988. Original ending. No direct Mythos mentions.
Clark Ashton Smith, "The Music of Death", in Strange Shadows: The Uncollected Fiction and Essays of Clark Ashton Smith, Steve Behrends with Donald Sidney-Fryer and Rah Hoffman, ed., Westport, CT: Greenwood Press, Inc., 1989. Outline and fragment. Mentions Hastane, Philip.
Clark Ashton Smith, "The Infernal Star", in Strange Shadows: The Uncollected Fiction and Essays of Clark Ashton Smith, Steve Behrends with Donald Sidney-Fryer and Rah Hoffman, ed., Westport, CT: Greenwood Press, Inc., 1989. Fragment. Mentions Antillia; Atlantis; Avalzant; Averoigne, France; Carnamagos; Cimmeria; Eibon; Ghooric Zone; Hali [prophet]; Hyperborea; Lomar; Mhu Thulan; Moaria; Mordiggian; Necronomicon; Pandemonium; Pnidleethon; Poseidonis; Psollantha; The Testaments of Carnamagos; Thilil; Vermazbor; Vertnain; Yamil Zacra; Yuzh; Zothique.
Clark Ashton Smith, "Mnemoka", in Strange Shadows: The Uncollected Fiction and Essays of Clark Ashton Smith, Steve Behrends with Donald Sidney-Fryer and Rah Hoffman, ed., Westport, CT: Greenwood Press, Inc., 1989. Fragment. Mentions Aihais; Ignarh-Vath; Mars.
Clark Ashton Smith, "The Fugitives", in Strange Shadows: The Uncollected Fiction and Essays of Clark Ashton Smith, Steve Behrends with Donald Sidney-Fryer and Rah Hoffman, ed., Westport, CT: Greenwood Press, Inc., 1989. Play fragment. Mentions Alnlephrom; Poseidonis.
Clark Ashton Smith, "I Am a Witch", in Strange Shadows: The Uncollected Fiction and Essays of Clark Ashton Smith, Steve Behrends with Donald Sidney-Fryer and Rah Hoffman, ed., Westport, CT: Greenwood Press, Inc., 1989. Synopsis for unwritten story. Mentions Arkham, MA.
Clark Ashton Smith, "The Galley from Atlantis", in Strange Shadows: The Uncollected Fiction and Essays of Clark Ashton Smith, Steve Behrends with Donald Sidney-Fryer and Rah Hoffman, ed., Westport, CT: Greenwood Press, Inc., 1989. Synopsis for unwritten story. Mentions Atlantis.
Clark Ashton Smith, "Poseidon", in Strange Shadows: The Uncollected Fiction and Essays of Clark Ashton Smith, Steve Behrends with Donald Sidney-Fryer and Rah Hoffman, ed., Westport, CT: Greenwood Press, Inc., 1989. Synopsis for unwritten story. Mentions Atlantis.
Clark Ashton Smith, "The Dead Will Cuckold You", in Strange Shadows: The Uncollected Fiction and Essays of Clark Ashton Smith, Steve Behrends with Donald Sidney-Fryer and Rah Hoffman, ed., Westport, CT: Greenwood Press, Inc., 1989. Play. Mentions Faraad; Ililot; Mumba Vut; Thasaidon; Yoros; Zothique.
Clark Ashton Smith, "In the Book of Vergama", in Strange Shadows: The Uncollected Fiction and Essays of Clark Ashton Smith, Steve Behrends with Donald Sidney-Fryer and Rah Hoffman, ed., Westport, CT: Greenwood Press, Inc., 1989. Unpublished preface to "The Last Hieroglyph". Mentions Cincor; Naat; Vergama; Xylac; Zothique.
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Lin Carter has taken some of CAS's text fragments and synopses and built his own Mythos stories around them. I include these "posthumous collaborations" for completeness's sake:
Clark Ashton Smith and Lin Carter, "The Utmost Abomination", Weird Tales, Vol. 47, No. 2, Fall 1973. Mentions Eibon; Serpent-People; Milaab; Uori; Iqqua; Yhoundeh; Tsathoggua; Zylac; Mhu Thulan; Antillia; Mu; Voormis; Hyperborea; Thule; Yig; Han; Byatis; Thuria; Valusia; Zloigm; Ylidiomph; Cykranosh (Saturn); Pnom.
Clark Ashton Smith and Lin Carter, "The Double Tower", Weird Tales, Vol. 47, No. 3, Winter 1973. Mentions Zloigm; Pornox; Mantichora; Crxyxll; Kir; Shaggai; Elder Gods; Circle of Power; Yggrr incantation; Nn'gao elixir; Scarlet Sign; Z light; Chian games; Glorgne; Xu language; Sgandrom; Marbar; Focalor; Zepar; Bifrons.
Clark Ashton Smith and Lin Carter, "The Scroll of Morloc", Fantastic, October 1975. Mentions Gnophkehs; Mhu Thulan; Polarion; Voorm; N'kai; Shathak; Phenquor; (Great) Old Ones; Hyperborea; Rhan-Tegoth; Tsathoggua; Voormis.
Clark Ashton Smith and Lin Carter, "The Stairs in the Crypt", Fantastic, August 1976. Mentions Ghouls; Hyperborea; Nyogtha; Commoriom; Hyperborea; Cerngoth; Leqquan; (Great) Old Ones; Pnakotic Pentagram; Ymboth; Shimba.
Clark Ashton Smith and Lin Carter, "The Light from the Pole", in Weird Tales #1, Lin Carter, ed., New York: Kensington Publishing Co. (Zebra Books), 1980. Mentions Aphoom Zhah; (Eibon); Hyperborea; Rlim Shaikorth; (Book of Eibon); Pnom; Evagh; Yikilth; Pnakotic Manuscripts; Lith; Tscho Vulpanomi; Achoravomas; Yarak; Mhu Thulan; Polarion; Elder Gods; Thulask; Cerngoth; Aquil; Fomalhaut; Cold Ones; Oszhtror; (Great) Old Ones; Elder Sign.
Clark Ashton Smith and Lin Carter, "The Descent into the Abyss", in Weird Tales #2, New York: Kensington Publishing Co. (Zebra Books), 1981. Mentions Atlach-Nacha; (Book of Eibon); Gray Weavers; Haon-Dor; Hyperborea; Serpent-People; Aphoom Zhah; Yaksh; Voormis; Gnophkehs; Y'qaa; Yarnak; Mnomquah; (Cthugha); Betelgeuse; Voormithadreth, Mt.; Eiglophian Mountains; Gorgons; Ubbo-Sathla; Elder Gods; Elder Records; Elder Hierophant (High Priest of Leng); Yogmosh-Voth; Zulchequon; Mu; Zylas the Archimage; K'n-Yan; Elder Key; Shantaks; Voormish tablets; Fishers from Outside; Quumyagga; Golgoroth; Leng; Ghouls; Nug; Nyogtha; Sss'haa; Yig; Yeb; Abhoth; Unclean Ones; Tch'tkaa; Tsunth; Hidden Ones; Miri Nigri; Dark Ones; Chaugnar Faugn; Ghatanothoa; Yegg-ha; Night-Gaunts; (Nyarlathotep); Yibb-Tstll; E-poh; Tcho-Tcho People; Lesser Old Ones; Shoggoths; K'thugguol; Polar Ones; Pnakotic manuscripts; Shub-Niggurath; Azathoth; Parchments of Pnom; Tsathoggua; Yog-Sothoth; Cthulhu; Glyu-Vho; Ezdagor; Raphontis.
Lin Carter, "The Unbegotten Source", Crypt of Cthulhu, No. 23, St. John's Eve 1984. Incorporates text from "Ubbo-Sathla" by Clark Ashton Smith. Mentions Azathoth; Book of Eibon; Celaeno; Elder Gods; Haon-Dor; Ubbo-Sathla; Y'qaa; Smith, Clark Ashton; (Great) Old Ones; du Nord, Gaspard; Tsathoggua; Yog-Sothoth; Cthulhu; Elder Keys; (Elder) Records; Voormithadreth, Mt.; Hyperborea; Tsath-yo; Eibon; Sarnath; Faber, (Caius) Philippus; Polar Ones (Old Ones).
Clark Ashton Smith and Lin Carter, "The Feaster from the Stars", Crypt of Cthulhu, No. 26, Hallowmas 1984. Mentions Hyperborea; Zvilpogghua; Vooth Raluorn; Commoriom; Algol; Exorcisms of Pnom; Pnom; Yzduggor; Shathak; Yaksh; Eiglophian Mountains; Voormis; Uzuldaroum; Ymar.
Clark Ashton Smith and Lin Carter, "Papyrus of the Dark Wisdom", Crypt of Cthulhu, No. 54, Eastertide 1988. Contains "The Unbegotten Source". Mentions Book of Eibon; Cthulhu; Deep Ones; Ubbo-Sathla; Pnakotis; Shoggoths; Spawn of Cthulhu; Old Ones/Polar Ones; Polypous Race/Elder Beings; Great Race of Yith; Ghatanothoa; Ythogtha; Zoth-Ommog; Moon; Pnakotic Manuscripts; Elder Records; Yaksh; Tond; Xoth; Abbith; Metal Brains of Abbith; Idh-yaa; R'lyeh; Yaddith-Gho; Mu; Yhe; Ponape; Copeland, Prof. Harold Hadley.
Copyright © Chris Jarocha-Ernst 1996