I took a quick look at the mysterious Weird Tales author of 1933-1937…
The only genealogical candidate I could find was a Mearle Wilson Prout (1911-1964) from Texas. He was exactly the right age to have written the Prout stories, from circa age 21 to 25.
* “The House of the Worm“, debut short story, Weird Tales for October 1933.
* “Masquerade”, short story, Weird Tales for February 1937. (Translated into French as “Le Carnaval de l’horreur”)
* “Guarded“, short story, Weird Tales for March 1938.
* Letter in Weird Tales for May, Aug 1937.
* Letter in “Discussions” column in Amazing Stories “while [the title was] under Gernsback’s control”.