Theodore Sturgeon
He sold his first story in 1938 to the McClure Syndicate, which bought much of his early (non-fantastic) work; his first genre appearance was "Ether Breather" in Astounding Science Fiction a year later. At first he wrote mainly short stories, primarily for genre magazines such as Astounding and Unknown, but also for general-interest publications such as Argosy Magazine. He used the pen name "E. Waldo Hunter" when two of his stories ran in the same issue of Astounding.  A few of his early stories were signed "Theodore H. Sturgeon."