Speaking personally, it stands to reason for me that Saturn's nature when oriental is cold & dry and *not* cold and moist, even though the second edition of 'CA' seems to confirm the cold/moist description in the original. It's always possible that a mistake was made in the original 1647 version and this mistake was overlooked in the 1659 version. We may never know, so I'm going with what seems to be a rational approach ~even though I know that what appears rational in astrology often falls at the first hurdle!
As for the whole oriental/occidental theme, I'd like to put forward my theory about how far a planet must be from the Sun in order to regain its inherent nature. I believe that the 34 degree orb encompassed by the Sun's beams (17 degrees either side) is the limit.
Consider:
A planet, let's say Venus, is moving more swifty than the Sun and begins to approach from behind. It is occidental and 20 degrees away, and its nature is 'temperately cool and moist'. When it is 17 degrees behind the Sun it enters the sunbeams and loses it's temperature and is now just 'moist' It remains moist (somehow!) throughout combustion and cazimi, and as it emerges ahead of the Sun and becomes oriental it has been heated by the Sun's rays and is now 'hot and moist' until it leaves the sunbeams, whereupon it regains its inherent coolness.
This idea works for all the planets except Saturn, who is dry when occidental yet *cold* and dry when oriental. Why should this be? The only speculation I can offer is that the sources that Ptolemy drew upon (Hellenistic? Babylonian? Egyptian?) considered Saturn to be the antithesis of the Sun in temperature and therefore impervious to the Sun's heat. It was the greater malefic and very, very cold. That's why they gave Saturn to the solar sect: they considered it the only way to decrease some of its maleficity.
Again, this is just a theory I'm putting forward for consideration, for which I'm using 'Occam's Razor', ie: the simplest solution among many is usually the right one!
Cheers...
