obituary in the Los Angeles Times for an overview of his life and achievements. But he also had a significant impact on the life and career of a certain Ray Bradbury.
I wish I had time to go into greater detail, but at the moment the best I can do is mention a couple of things off the top of my head:
Corwin was the one who urged Bradbury to get to New York and try to sell a book. The result of that urging was Ray's meeting with Walter Bradbury, who published Ray's first major-publisher book: The Martian Chronicles.
Corwin was originally intended to direct Bradbury's radio play Leviathan '99, which became Bradbury's first work for the BBC. As it turned out, Corwin didn't get to do the job, but decades later he was able to participate in a new radio version of the story, when Bradbury's novella version of Leviathan '99 was dramatised for radio in LA.