Question: Megan Hart's inspiration to write was an expansion on which earlier short story ?

Context articles: Dr. Futurity
Hard Boiled Sweets
Within the Woods
Megan Hart
The Stand
Bug-Jargal
Lord of Illusions
The Sound (short story)
The Dark Eyes of London (novel)
The Angel on the Roof

Dr. Futurity is a 1960 science fiction novel by Philip K. Dick.
 It is an expansion of his earlier short story "Time Pawn", which first saw publication in the summer 1954 issue of "Thrilling Wonder Stories".
 "Dr. Futurity" was first published as a novel by Ace Books as one half of Ace Double D-421, bound dos-à-dos with John Brunner's "Slavers of Space".
Hard Boiled Sweets is a 2012 British crime drama film written and directed by David LG Hughes.
 It tells the story of a group of squabbling Essex gangsters.
 The cast includes two actors (Paul Freeman and Ian Hart) that had appeared in Hughes' earlier short film "A Girl and a Gun" from which this, his first feature, was developed.
Within the Woods is a 1978 horror short film written, directed and produced by Sam Raimi.
 Raimi drew inspiration from his earlier short film "Clockwork", deciding to produce a "prototype" horror film to help build the interest of potential investors.
 Raimi cast his friends Bruce Campbell and Ellen Sandweiss as the two protagonists and produced the film for $1600.
 Shot on location in a remote cabin in the woods, production was a difficult process because of the low budget.
 Several of the special effects presented in the film were done in a severely low budget manner, some of which were improvised on set.
 The film centers around demonic possession and mysterious forces originating from the woods.
Megan Hart is an American author of romantic and erotic novels.
 Hart became interested in writing after reading the Ray Bradbury short story "Homecoming".
 Moved by this work, she rewrote her own version and began creating stories.
 She was inspired to write professionally after reading Stephen King's "The Stand".
 After a long break Hart resumed writing in 1998, publishing her first book in 2002.
The Stand is a post-apocalyptic horror/fantasy novel by American author Stephen King.
 It expands upon the scenario of his earlier short story "Night Surf" and outlines the total breakdown of society after the accidental release of a strain of influenza that had been modified for biological warfare causes an apocalyptic pandemic which kills off the majority of the world's human population.
Bug-Jargal is a novel by the French writer Victor Hugo.
 First published in 1826, it is a reworked version of an earlier short story of the same name published in the Hugo brothers' magazine "Le Conservateur littéraire" in 1820.
 The novel follows a friendship between the enslaved African prince of the title and a French military officer named Leopold D'Auverney during the tumultuous early years of the Haitian Revolution.
Lord of Illusions is a 1995 American horror film written and directed by Clive Barker, based on his earlier short story, "The Last Illusion" (from "Books of Blood" Vol.
 6).
 The film presents Barker's signature character Harry D'Amour onscreen for the first time.
 It stars Scott Bakula as D'Amour, alongside Kevin J. O'Connor, Famke Janssen and Daniel von Bargen.
"The Sound" is a science fiction short story by Canadian-American writer A. E. van Vogt, originally published in "Astounding" in February 1950.
 In contrast to his earlier short stories, "The Sound" has a distinctly Red Scare feel to it.
 It involves the alien Yevd who can take on any form, and a young boy that thwarts their effort to infiltrate a naval spaceship yard.
The Dark Eyes Of London is a crime novel by the British writer Edgar Wallace which was first published in 1924.
 An unbalanced doctor and his brother murder a series of wealthy men to benefit from their life insurance policies, using a charity for the blind as a front for their activities.
 The persistent Inspector Holt of Scotland Yard is soon on their trail.
 It was based on an earlier short story "The Croakers" which Wallace had written.
The Angel on the Roof: The Stories of Russell Banks (2000) is a collection of short stories by Russell Banks.
 It consists of a total of thirty-one previously published stories, including twenty-two stories that appeared in earlier short story collections, along with nine that were previously uncollected.