The Library · Hellenistic tradition
A chapter of Mathesis (Theory and Practice) by Julius Firmicus Maternus, c. 335 CE.
The largest surviving Latin astrology treatise. Eight books on the doctrine of natal interpretation, decans, and planet-in-sign delineations.
The full chapter text renders in the interactive Library reader, with the engine's cited rules linked to the passages they derive from.
The whole book · The rule book · The Library