Branch Cabell, Clark Ashton Smith, Robert E. Howard, Frank Belknap Long (who wrote a tribute to Machen in verse, "On Reading Arthur Machen"), Donald Wandrei, David Lindsay and E. Charles Vivian. His significance was recognized by H. P. Lovecraft, who in his essay "Supernatural Horror in Literature" named Machen as one of the four "modern masters" of supernatural horror (with Algernon Blackwood, Lord Dunsany, and M. R. James). Machen's influence on Lovecraft's own work was substantial. Lovecraft's reading of Machen in the early 1920s led him away from his earlier Dunsanian writing towards the development of what became the Cthulhu Mythos. Machen's use of a contemporary Welsh or London background in which sinister ancient horrors lurk and are capable of interbreeding with modern people obviously helped inspire Lovecraft's similar use of a New England background. Machen's story "The White People" includes references to curious unknown rites and beings, an idea Lovecraft uses frequently in the mythos. Lovecraft pays tribute to the influence by directly incorporating some of Machen's creations and references, such as Nodens and Aklo, into his Cthulhu Mythos and using similar plotlines, most notably seen by a comparison of "The Dunwich Horror" to The Great God Pan and of "The Whisperer in Darkness" to "The Novel of the Black Seal". Other Lovecraft tales with a debt or reference to Machen include "The Call of Cthulhu", "The Festival", "Cool Air", "The Descendant", and "The Colour Out of Space". His intense, atmospheric stories of horror and the supernatural have been read and enjoyed by many modern horror and fantasy writers, influencing directly Peter Straub, Stephen King, Ramsey Campbell, Karl Edward Wagner, "Sarban" (John William Wall), Joanna Russ, Graham Joyce, Simon Clark, Tim Lebbon, and T. E. D. Klein, to name but a few. Klein's novel The Ceremonies was partly based on Machen's "The White People", and Straub's novel Ghost Story was influenced by The Great God Pan. Wider literary influence Machen's influence is not limited to genre fiction, however. Jorge Luis Borges recognized Machen as a great writer, and through him Machen has had an influence on magic realism. He was also a major influence on Paul Bowles and Javier Marías, the latter of whom dedicated a subplot of his 1989 novel All Souls to collecting the works of Machen and his circle of peers. He was one of the most significant figures in the life of the Poet Laureate