We talked in the last stage about the Sun being a strongly placed planet. There are two traditional reasons for its strength in MS' chart.
The first is that it's in the sign of its rulership, Leo. The second is that it's Angular - or at least we could treat it as Angular if we use a fairly wide orb for Conjunctions.
The Sun represents our creativity, will, identity, vitality, the fundamental quality of our consciousness. In it's own sign the Sun will not be easily prevented from shining through - this is a woman who is highly creative, has much vitality, strong willed and has sheer presence.
Leo is a fire sign - people with the Sun in Fire tend to be highly active and inspired, assuming that there are few factors in the chart which reduce this inspired activity.
Martha was also born during the day (a little after the local solar noon) - a diurnal birth - The Arab Astrologer Abu Ali Al-Khayyat described the native with Sun in Leo for a diurnal birth as
'beloved, ruling, rich, great, and strong and riches will come to him from highly placed men and from leasing lands and managing country estates'.
Allowing for the fact that in Al-Khayyat's time (770 - 835 AD) that convenience stores did not exist, this is a fair description of a successful business person (Women were not prominant in business during his time, more's the pity).
The House placement really depends on whether we accept the conjunction with the MC or not. If we do (and I'm inclined to at least see the Sun afffecting the 10th and the 9th) then the placement is even stronger.
The Sun is bound to have a role in the tenth, even if we insist on confining it to the ninth, for it is the MC ruler. The Sun also trines Mars the Ascendant ruler - so we have an association between the self and the social expression of the self (the career or social position and standing). Al-Khayyat sees such a relationship as suggesting that the native will attain great honour - which seems to be the case here.
Martha will express her creativity, vitality, her identity through her career and social position. Given the Sun on the ninth side of the MC, her own spiritual growth and development will be linked to her career. The Moon rules the ninth so when we get round to a discussion of the relationship of Sun and Moon this could be factor that we take into account.
The Sun also is sextile to Jupiter, the greater benefic and Jupiter is in the eighth House, associated with business corporations and their income. So we have a link between career and a growth (Jupiter) of income from a business corporation or corporations.
The individual aspects of the Sun, we might look at later - but it is worth noting that the Sun has only harmonious aspects to the other planets (unless we treat a conjucntion with Pluto as a hard aspect) so one of the issues will be to look for what drives Martha - what makes her get up and use the powerful Solar energy?
Many Astrologers look at hard aspects such as squares and oppositions to provide the motivational force to act. This driving force is something we can look at as we go.