#OnThisDay in 1964 #BlackHand debuted in @DC.com #GreenLantern #comics #29 #WilliamHand #BlackSheep of #TheHandFamilyOfCoastville with the help of #storyArtist #GilKane #explainsToReaders how he created #aDeviceToCollectGreenLanternsPowerRingEnergy to dispatch #HalfOfHalJordan to another dimension