robert wrote:
Those sound a lot like the basic questions I always come back to... Why these 22 images? Why 22?
I would suggest that depending on how you interpret the narrative, and what your origin theory might be, will determine whether or not you think the number of trumps is significant or merely accidental.
For instance, if I interpret Michael Hurst correctly, he thinks the number is accidental, and is a product of the narrative. That is, each card was chosen for a very specific reason, and the next one in the sequence also for a specific reason to trump the former. The resulting sequence happened to have 22 cards.
The only theory Michael Dummett has ever offered seems to be that the proportion of suit cards to trumps was desired to be 2:3 - i.e. 14:21 (14 cards per suit, 21 trumps), or 16:24 (the hypothetical Cary Yale ratio).
Personally I tend the think the number was determined beforehand and thus limited the extent of the narrative. There is no necessary reason to exclude Prudence, the Theological Virtues, the elements, the planets and the signs - this is exactly what the Minchiate designer included. But the Minchiate puts them all in together in a single clump between Fire and the Star, without further disturbing the traditional order by doing something like including Prudence with the three other Virtues.
Dummett's mathematical proportion theory is attractive, but it is merely descriptive - it doesn't explain *why* that proportion was found appealing. Perhaps the game designer wanted to make sure that there were enough trumps to make the game interesting for four players (all of whom would be guaranteed *some* trumps in a typical deal this way), or maybe the number was symbolic. I have speculated that 21 connects to dice games, and that it was thus a symbol of Fortune, which is appropriate for cards games in general and is depicted in the middle of the trump series.