Jung hasn't published yet, but most of his big ideas are here. We've got the Collective Unconscious, we've got Archetypes. Come on in, Herr Doctor, I've got this stuff that needs systematizing. And I thought Jung got his stuff from Freud! Imagine Jung reading Blackwood and: Lo! The Blue Bolt! I suppose we can't credit any of them; we must instead acknowledge the zeitgeist that sensitive people like the tormented Blackwood and the mystical Jung articulated for their time. The Golden Age of ghost stories (says my paperback book, Great Ghost Stories) was from 1864-1912. I guess the nice and polite Victorian era gave us this gift of learning about the inchoate darkness from which primitive emotions arise, because the more those sexual and other strong, taboo feelings were suppressed, the more energy was fed to the psychoid level of the collective. I just pulled from my dustiest bookcase (Blackwood would smile a cold smile) an old tattered (of course!) book from my Jungian days, Ira Progoff's Jung, Synchronicity, & Human Destiny. Here's what he says about the depths of the collective, wherein strong, primitive emotions coalesce to shape the archetypes: "...Great intensities of energy are activated when the human being touches the psychoid level of his nature where instinct and archetype are one." The lighter the surface, the more roiling and energized the depths.