Yeah, I figured he wouldn't of have, I suppose it's something we have to work out ourselves. Like dating (without marriage) for instance, isn't something I hear a lot about regarding the divisional charts because I suppose it wasn't really much of a thing back then. However, I've heard a few contemporary astrologers attribute dating life to the Saptamsha, which in their view governs one's non-marital dating life and not just offspring.
Which makes me wonder then if one of the divisional charts could be associated with the social life.
Example from my own life, during my Jupiter dasha I was very extroverted, liked to spend most of my time with friends, popular etc. Jupiter is in Sagittarius in the 5th house in my Rashi chart and in the 5th in the Navamsa.
However, I then entered my Saturn dasha and it is the opposite, I became much more introverted, spent less time with friends etc. Saturn rules my 7th and is exalted in my Rashi chart... however it is debilitated and in the 12th in my Navamsa chart... and this makes me think the Navamsa may also relate to one's social life.
An astrologer I respect quite highly,
Hank Friedman, says that the topic of life governed by the divisional chart will go well or poorly depending on the condition of the dasha lord in that divisional chart.