Athena prorogator

[Hermes777]

In a nativity the prorogator is the ruling planet that determines, it is said, the longevity of the native

Could there be a potential link between this term and the images in Q13?

Possible, yes. 

Any possible link would depend upon the nymphs representing the degrees of the zodiac. It is (highly) arguable that this is what is shown in the zodiac pages. In that case, different degrees have different strengths and powers.  Some degrees mark 'dignities' and 'exaltations' or else 'debilities' of the various planets (and Ascendant). (The 21st degree of Libra is the exaltation of Saturn, for instance.) To determine the proragator (hyleg) you have to assess the strength of each planet. The proragator is then the strongest planet in any given case. 

In Ptolemaic astrology only the Sun, Moon and Ascendant are usually considered, or else the Part of Fortune (a synthetic Soli-Lunar point) or else in some cases the New Moon prior to the nativity. A (clunky) system of points was developed to assess the relative powers of each. 

The most important idea is that the planet in hyleg is the "divine spark of life" or a spark of the Divine Light. If that spark is strong = long life. It is a measure of innate vitality. The astrologer searches the nativity for the spark of life and measures its strength. 

As a general point I take it that the Voynich MS. is vitalistic in this way and presents a vitalistic cosmology. 

On my own reading of the nymphs and Q13 I see the nymphs as personifications of the mountain alpenglow - the very first rays of light to illumine a mountain peak and make it light up like a candle - which would indeed have a ready correspondence with the astrological phenomenon of the proragator (hyleg) because the symbolism of the alpenglow is that of "spark of Divine Light".) 

But you won't understand this correspondence without seeing the nymphs as mountain nymphs personifying the alpenglow and without understanding the symbolism of the alpenglow (which I regard as one of the keys to the work.) There is a ready and natural correspondence between the alpenglow and the proragator in astrology. Both represent the spark of Divine Light.   So in that case we might expect text about these astrological matters in that part of the text. 

I think you are making astute suggestions Ruby. This is one of them. I at least can see how text regarding the proragator would be relevant in Q13. It is worth pursuing.