Part III: The Circumference and the Hieroglyphic Monad in In Operibus Sigillo Dei Aemeth by David Richard Jones.

“Curiously, and we have to wonder if it was known or unknown to Dee, the geometry of the Monad as analyzed and expected in Theorem XXIII when applied to a circle subdivides the circumference of a circle into seven equal divisions with almost perfect elegance. This finding was first made by Clay Holden, in whose debt we are for this important discovery and the initial geometric constructions demonstrating the figure.

This correlation of the Monad to the sevenfold division of the circle indicates that an intimate relationship may exist between the metaphysical formulae of Dee’s Monad and Sigillum, sevenfold division being the very foundation of the formulae of the Sigillum.” [via]