Harry Warner, Jr.
Harry Warner, Jr. (1922-February 17, 2003) was an America science fiction fan, historian, letter writer and APA participant. He twice won the Hugo Award for Best Fan Writer.
Warner published his first fanzine in 1939, though he had been actively sending letters to several of the professional Science Fiction magazines for several years. He was the best known LetterHack from the late 1930s until his death in 2003. He wrote to full-length books about science fiction fandom.
The FAAn Award formerly known as Best LetterHack is now called The Harry Warner Jr. Award for Best Fan Correspondant