 In 1971, de Ossorio came up with the concept of "The Blind Dead", a cult of blind, undead Templar Knights who sucked human blood, rode skeletal ghost-horses and were attracted to their victims by the sound of their heartbeat.The first film, "Tombs of the Blind Dead", was so successful, he immediately embarked on a career as a Euro-horror film director.Three more "Blind Dead" films followed in quick succession..."Return of the Evil Dead", "The Ghost Galleon" and "Night of the Seagulls".