Ptolemy - Ptolemy's Tetrabiblos - Book 3: Ch. 13 lyrics

CHAPTER XIII THE NUMBER OF PROROGATORS, AND ALSO THE PART OF FORTUNE AFTER due attention has been given to the instructions in the preceding chapter, the Sun, the Moon, the Ascendant, and the part of Fortune, are to be considered as the four principally liable to be elected to the office of prorogator; and their positions, together with those of such planets as rule in the places of their positions, are to be observed. The part of Fortune is ascertained by computing the number of degrees between the Sun and the Moon; and it is placed at an equal number of degrees distant from the ascendant, in the order of the signs. It is in all cases, both by night and day, to be so computed and set down, that the Moon may hold with it the same relation as that which the Sun may hold with the ascendant; and it thus becomes, as it were, a lunar horoscope or ascendant. Among the candidates for prorogation, as beforementioned, by day the Sun is to be preferred, provided he be situated in a prorogatory place; and, if not, the Moon; but if the Moon, also, should not be so situated, then that planet is to be elected which may have most claims to dominion, in reference to the Sun, the antecedent new Moon, and the ascendant; that is to say, when such planet may be found to have dominion over any one of the places where these are situated, by at least three prorogatives, if not more; the whole number being five. If, however, no planet should be found so circumstanced, the Ascendant is then to be taken. By night, the Moon is to be elected as prorogator, provided, in like manner, she should be in some prorogatory place; and if she be not, the Sun: if he also be not in any prorogatory place, then that planet which may have most rights of dominion in reference to the Moon, and the antecedent full Moon and the part of Fortune. But, if there be no planet claiming dominion in the mode prescribed, the Ascendant must be taken, in case a new Moon had last preceded the birth; but, if a full Moon, the part of Fortune. If the two luminaries, and also some ruling planet of appropriate condition, should be each posited in a prorogatory place, then, provided one luminary may be found to occupy some place more important and influential than the others, that luminary must be chosen; but should the ruling planet occupy the stronger place, and have prorogatives of dominion suitable to the conditions of both luminaries, the planet must then be preferred to either of them