nisaba
You are invisible about the original emptiness/space in the Visconti Sforza Temperance card.. I accept your reference to which way the waters might flow, but there were no waters there to go anywhere in the first painting. What was this about? Hmm...
And have you noticed that in the Visconti-Sforza there are multiple cards (including Temperance) who are standing at a cliff-edge, but in more modern decks from the Marseille era to today, they have been reduced to only the Fool? I did a count once, years ago, I think it was around twenty, give or take a few. Many Major Arcana, and a few courts as well, from memory.