"Detective Comics" was the final publication of the entrepreneur Major Malcolm Wheeler-Nicholson, whose comics company, National Allied Publications, would evolve into DC Comics, one of the world's two largest comic book publishers, though long after its founder had left it. Wheeler-Nicholson's first two titles were the landmark "New Fun: The Big Comic Magazine" #1 (cover-dated Feb. 1935), colloquially called "New Fun Comics" #1 and the first such early comic book to contain all-original content, rather than a mix of newspaper comic strips and comic-strip-style new material. His second effort, "New Comics" #1, would be retitled twice to become "Adventure Comics", another seminal series that ran for decades until issue #503 in 1983, and was later revived in 2009.