Ei autem, qui supra solis iter circinationes peragunt, maxime cum in trigono fuerint, quod is inierit, tum non progrediuntur, sed regressus facientes morantur, donique cumidem sol de eo trigono in aliud signum transitionem fecerit.
Those planets which traverse their orbit above the path of the sun, especially when they are in the trigon which he has entered, do not go forward but retrograde and delay until the same sun has passed from that trigon into another sign.
final_alignments\Vitruvius_Architecture_Book_9.json