The great 17th century French astrologer Jean-Baptiste Morin de Villefranche used both whole sign and quadrant house systems. He regarded Regiomontanus as “formal” houses and whole sign houses as “accidental ones.” For example, in his delineation of the chart of King Gustav Adolf of Sweden who has Sagittarius rising and Saturn in Leo in the 8th Regiomontanus house but the 9th whole sign house, he interpreted that the king would die (8th house) in a foreign land (9th house). Here is a page from the original text of Morin where he discusses his approach.
The paragraph which begins at the red arrow reads (my translation): “Similarly in the nativity of King Gustav Adolf of Sweden, Saturn is formally in the 8th house and accidentally in the 9th, is exiled in the fire sign Leo and is damaged by a square from Mars in the 12th house …”
This is the king’s chart with Regiomontanus houses:
Morin was, of course, correct in his delineation. With Mars in the 12th square Saturn debilitated in Leo in the 8th Regiomontanus house but 9th Whole Sign house, the king was shot to death in 1632 in a battle in Germany, a foreign land. Morin was not aware of the planet Neptune (a god of moisture) in Leo in the 8th together with Saturn. It turns out that part of the reason for the king’s demise was a heavy fog on the day of the battle. The king got separated from his troops in the fog and was shot to death by enemy soldiers.
All original material in this blog is copyright Anthony Louis 2019.