Raymundus Joannes de Kremer under the Ray name, which was filmed by Harry Kümel in 1971 (starring Orson Welles). He also wrote journalism, stories for young readers in Dutch by the name John Flanders, and scenarios for comic strips and detective stories. He also used the pseudonyms John Flanders, King Ray, Captain Bill, Alix R. Bantam and Sailor John, among others.