Happy birthday, Carroll John Daly.
Born on September 14, 1889, pulp writer Carroll John Daly is credited with creating the first hard-boiled detective in "The False Burton Combs" (Black Mask, 1922; rpt. The Hard-Boiled Detective: Stories from Black Mask Magazine 1920-1951, ed. Herbert Ruhm, Vintage, 1977). He died in 1958. Daly's notable characters include the interestingly named Satan Hall and tough investigator Race Williams.
A possible article of interest is Penguin publicist Michael S. Barson's "'There's No Sex in Crime': The Two-Fisted Homilies of Race Williams" (CLUES: A Journal of Detection 2.2 [F/W 1981]: 103-12). You can probably only find it via interlibrary loan.