Les Rayons invisibles et les dernières expériences d'Eusapia devant l'occultisme

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Papus was the pseudonym of Gérard Encausse (1865–1916), a French physician and one of the most influential figures in late nineteenth-century occultism. He helped systematize and popularize French esoteric traditions through works on magic, Kabbalah, Tarot, and ceremonial occult philosophy, and he was a prominent organizer within the Martinist movement.