The Library · Medieval tradition
A chapter of Works of Sahl & Masha'allah by Sahl ibn Bishr & Masha'allah, c. 830 CE.
Two early Arabic masters of horary and electional. Sahl's questions and Masha'allah's nativities are the doctrinal base for Bonatti, Lilly, and Cardano.
The full chapter text renders in the interactive Library reader, with the engine's cited rules linked to the passages they derive from.
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