Arthur Machen (3 March 1863 - 15 December 1947) was a Welsh author and mystic of the 1890s and early 20th century. He is best known for his influential supernatural, fantasy, and horror fiction. His novella The Great God Pan (1890; 1894) has garnered a reputation as a classic of horror, with Stephen King describing it as "Maybe the best horror story] in the English language." He is also well known for his leading role in creating the legend of the Angels of Mons.