D.P. Walker

D.P. Walker (1914–1985) was a close colleague of Frances Yates at the Warburg Institute and a foundational historian of Renaissance magic. His seminal work, Spiritual and Demonic Magic from Ficino to Campanella (1958), fundamentally shaped the academic understanding of the mechanics of early modern occultism.

Spiritus and Demonic Magic

Unlike Yates, who painted sweeping macro-historical narratives, Walker focused meticulously on the technical mechanics of magic. He demonstrated how Ficino's magia naturalis relied on manipulating spiritus (the subtle, airy substance connecting body and soul) through music, planetary talismans, and diet. Walker traced how this seemingly innocent, medicalized magic was constantly haunted by the theological fear that planetary spirits were actually demons in disguise, leading to the severe orthodox backlash against figures like Cornelius Agrippa and Giordano Bruno.