The Great God Pan
"The Great God Pan" implied sexuality caused a scandal upon its original release and hurt Machen's reputation as an author. Reviewing the novella for the magazine "Literary News", Richard Henry Stoddard criticised the story as "too morbid to be the production of a healthy mind". The art critic Harry Quilter's review of the book, titled "The Gospel of Intensity", and published in "The Contemporary Review" in June 1895, was even more harsh. Quilter declared: "The Great God Pan' is, I have no hesitation in saying, a perfectly abominable story, in which the author has spared no endeavor to suggest loathsomeness and horror which he describes as beyond the reach of words." Quilter warned that Machen's books were a dangerous threat to the entire British public and that they would destroy readers' sanities and senses of morality. Quilter went on to attack the story's publisher, John Lane, as well as Machen himself: "Why should he be allowed, for the sake of a few miserable pounds, to cast into our midst these monstrous creations of his diseased brain?" Quilter added that works of fiction like Machen's should be unanimously condemned by literary critics and newspapers: "If the Press was so disposed it could stamp out such art and fiction in a few months: And that disposition must be acquired, must even be enforced." He was particularly harsh in his denunciation of sexual ambiguity and polymorphous androgyny in the book. He expressed revulsion at Machen's description of Helen's sex changing immediately before her death and concluded his review with a comment of distaste regarding the "nasty little naked figure of dubious sex and humanity with which Mr. Aubrey Beardsley has prefaced the story". A positive appraisal of the novella came from Oscar Wilde, who called it "un succès fou."
The Great God Pan
In a review of the novella for "Black Gate", Matthew David Surridge hypothesized that Machen took inspiration from Mary Shelley's "Frankenstein" (1818) in his portrayal of Dr. Raymond as a mad scientist akin to Victor Frankenstein. The works of Robert Louis Stevenson, especially his 1886 novella "Strange Case of Dr Jekyll and Mr Hyde", were among Machen's most significant influences when writing "The Great God Pan". Critic John Gawsworth also sees Machen's novella as reminiscent of the horror stories of Edgar Allan Poe and Sheridan Le Fanu. Aaron Worth noted similitude between the death of Helen Vaughan and the theories of alchemist Thomas Vaughan, who is the character's namesake and Helen's disintegration recalls the alchemical concept of the prima materia. John C. Tibbetts observes similarities between Helen Vaughan and Ayesha, the sexually liberated demonic priestess from H. Rider Haggard's "" (1886). Machen wrote that several critics felt that Joris-Karl Huysmans's novels "À rebours" (1884) and "Là-bas" (1891) had inspired "The Great God Pan", though he did not read either book until after "Pan" was published. Upon reading the two novels, Machen concluded that "my critics had not read them either."