Howard had previously dealt with beings similar to the titular Worms of the Earth in an earlier short story, "The Children of the Night", set in Lovecraft's Cthulhu Mythos.
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A two-part and thirty-seven page comic strip adaptation in black and white, adapted by Roy Thomas and penciled by Tim Conrad and Barry Windsor-Smith, was published by Marvel Comics' Curtis Magazines brand in December 1976 and February 1977, in issues #16 and #17 of The Savage Sword of Conan.
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