Joseph Shaw (editor)  Joseph T. "Cap" Shaw (1874–1952) was the editor of "Black Mask" magazine from 1926 to 1936. Prior to becoming "Black Mask" editor, Shaw had worked as a newspaper reporter and as a soldier in World War I, attaining the rank of captain (Shaw's friends gave him the nickname "Cap"). Shaw was also a professional fencer, and even won an Olympic medal for his fencing ability.