Acccording to the Encyclopedia of Science Fiction Beresford Egan (1905–1984) was an …
“UK artist, illustrator and author, in South Africa from 1910 to 1926, who early established a reputation for sexually charged and otherwise transgressive illustrations for works like the 1928 translation of Pierre Louÿs’s Aphrodite (1896); he also did covers for Aleister Crowley’s Moonchild (1929) and Sean M’Guire‘s Lost Race novel Beast or Man? (1930): as in Crowley’s case, his later career long outlived the time when Decadence could fairly be seen as response to the brutalities of late nineteenth-century philistinism, though his first novel, Pollen: A Novel in Black and White (1933), explores the boundaries of the then permissible as its “deco-decadent” protagonist experiences supernatural ecstasies in Paris. Of more direct sf interest is Epilogue (coll 1946), a series of sketches of imagined post-World War Two life, including one, “A Trip to the Moon”, in which Space Flight to the Moon is presented archaically.”
http://www.sf-encyclopedia.com/entry/egan_beresford.
Here’s the cover art for the cover of Aleister Crowley’s “Moonchild”, sold at an auction in 2010.