#OnThisDay in 1939 #Batman debuted in #DetectiveComics #27 #smilingByPageThree & introducing #CommissionerGordon in a #herringboneOvercoat that could induce seizures #boredYoungSocialite #BruceWayne tackles #TheCaseOfTheChemicalSyndicate in #hisLoneBattleAgainstTheEvilForcesOfSociety