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Book by John Dee
John Dee's Heptarchic lamen in Enochian (left) and English (right)
De Heptarchia Mystica, or On the Mystical Rule of the Seven Planets, is a book written in 1582–83 by English alchemist John Dee. It is a guidebook for summoning angels under the guidance of the angel Uriel and contains diagrams and formulae.
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