Paul Cain (pen name) in the context of "Black Mask (magazine)"

Black Mask was a pulp magazine first published in April 1920 by the journalist H. L. Mencken and the drama critic George Jean Nathan. It is most well-known today for launching the hardboiled crime subgenre of mystery fiction, publishing now-classic works by Dashiell Hammett, Raymond Chandler, Erle Stanley Gardner, Cornell Woolrich, Paul Cain, Carroll John Daly, and others.