#OnThisDay in 1947 #BlackCanary debuted in #FlashComics #86 #mysteriousBlonde who #JohnnyThunderAndHisMagicThunderbolt help to get a #DominoMask outOfASafe before #aGangOfCrooks couldUse it toSteal #aValuableSapphire (?) #soonTakesOverTheComicFeature & joins #TheJSA85 migratesTo #Earth1 #JLA in 1969

#OnThisDay in 1947 #BlackCanary debuted in #FlashComics #86 #mysteriousBlonde who disappears after #JohnnyThunderAndHisMagicThunderbolt helps her get a #DominoMask from a safe that #aGangOfCrooks are after ToUseToStealAValuableSapphire #laterTakesOverHisComicFeature&migratesTo #Earth1 #JusticeLeague