Kwaw, you call the Petit Oracle des Dames "Etteilla's Petit Oracle". I don't see how the Petit Oracle can be identified with Etteilla. There are too many differences between its system and Etteilla's. I think it is worth listing some of them.
(1) The astrological assignments are often different. For 3, the Petit Oracle has Cancer, which corresponds to the crayfish in the picture; Etteilla has Gemini for this Moon card. Then in 4, the Petit Oracle has Aquarius for this water-pourer, while Etteilla has Cancer. The Petit Oracle has nothing for Prudence, whereas Etteilla gives it Pisces. The Petit Oracle gives Temperance and Night/Day the same astrological sign, Aquarius, while Etteilla's are Capricorn and Virgo. Justice for the Petit Oracle is Libra, but Sagitarius for Etteilla. (I notice that astrological assignment and position--11--agree with Waite; similarly, Strength is 8.) The Petit Oracle gives no astrological signs for any of the virtue cards besides Justice, while Etteilla gives them for all three. The Petit Oracle gives Saturn to the Hermit, who has nothing in Etteilla. The Petit Oracle gives no astrological sign to the Clubs (= Coins for Etteilla), whereas Etteilla gives the number cards in Coins the 7 planets plus three other signs.
(2) The interpretations are also frequently at odds with Etteilla's.
The assignment of animals to seasons in the Petit Oracle is different from Etteilla's (see
http://www.tarotforum.net/showpost.php?p=3229957&postcount=3). Etteilla has Spring as the Man, Autumn as the Eagle, and Winter as the Bull.
For the water-pourer, 4, Etteilla has "Loss"; the Petit Oracle says this card is a sign of happiness, fertility and regeneration, associated also with prosperity and success. The Petit Oracle says the 8 of Hearts (i.e. Cups) associated with it in the Reversed is Thought; in Etteilla, that is the 7 of Cups.
Etteilla associates the "Last Judgment" image with Judgment, not with the creation of humanity, which comes from de Mellet. In the reversed, the Petit Oracle has "generation" and a 10 of Clubs; there is nothing about that for Etteilla's 10 of Coins.
Etteilla has no expulsion from Paradise.
The Petit Oracle has "Ennui" for the 4 of Diamonds (Batons); in Etteilla, that is the 4 of Cups. The other 4s are likewise not right.
The Petit Oracle's Force Majeur has the left-hand small figure reaching up to the upper figure's genitals, and described in these terms in the booklet. This is not in Etteilla's image.
The Death card is at 13, the booklet says, because the ancients held that this was the least fortunate number. Etteilla said that the ancients held that 17 was the least fortunate number, and gave that number to Death accordingly.
Etteilla said in the Third Cahier that today the Hermit card means a Traitor or hypocrite; it shown with the keyword "Traitre" on the 1789 card, both upright and reversed; whereas for the Petit Etteilla there are two Hermits, one a Sage.
The analysis of "Augmentation", the reversed meaning of the Fortune card, says that the monkey waving a baton (also depicted in Etteilla's card) represents how “ignorance and baseness are favored by fortune, which forgets genius and virtue.” This is not in Etteilla.
The Chariot is for the Petit Oracle a symbol of Osiris and predicts protection, putting an end to dissension (even though the keyword is "dissension"), whereas for Etteilla it is the cause of dissension, with nothing positive.
The Petit Oracle's "choice between vice and virtue" has no equivalent in Etteilla.
The King of Batons (Diamonds) in Etteilla is not the Petit Oracle's Jupiter or a Protector, nor is his Queen a Juno or Protectress.
And so on.
It is true that Etteilla did modify some of his keywords between 1782 and 1789, and even between the 3rd Cahier of 1782 and the supplement to the 4th in 1785. (I plan to have a post on the latter soon, on the 3rd Cahier thread.) But these modifications were minor and nothing like what we see in the Petit Oracle.
I am not sure who designed the Petit Oracle and wrote the booklet. The publisher listed in the booklet is Ducessois, 55 Quai des Augustine, Paris. In c. 1840 the address of Delarue, associated with Blocquel (in Lille) as co-publisher of the "Julia Orsini", was 11, Quai des Augustine. Perhaps the two addresses are related. The Petit Oracle might be the work of D'Odoucet, since he was in Lille after 1804 and known to have been at odds with Etteilla, who called D'Odoucet "Dodo". Perhaps there was more to that disagreement than politics (D'Odoucet being a royalist). Another clue is that Prudence is described as having the word "Thot" on her belt, and she is thus depicted on the card. D'Odoucet's
Science des Signes has the only other picture of Prudence depicted in that way (shown by Halbronn in his
L'Astrologie du Livre de Thot).
(Added 9/1: checking in
Wicked Pack of Cards, which came out after Halbronn, I see that the 1789 deck's Prudence depicted there does have "Thot" on her belt, visible in an enlargement that I made. So this feature is not an innovation of D'odoucet/s.)
.)
(Added 8/29: Huck has a thread at
http://forum.tarothistory.com/viewtopic.php?f=11&t=824&p=11735&hilit=grasset#p11735 documenting the announcement of a deck called Petit Oracles des Dames in January 1800; no author is given, but the address matches other work published by Jacques Grasset de Saint-Sauveur around the same time. Huck argues persuasively that this is the deck we know by that title, and that he produced it, perhaps with the help of one or two others whom he identifies. Whether he designed the deck is another matter, but I don't see why not. Whether he wrote the booklet that the BNF associates with it is also another matter, since the address on the booklet is not what is on the announcements.)
It would be of interest, I think, to see a deck earlier than the Petit Oracle that has its non-Etteilla images and/or keywords. Then we we might have a better idea of the French cartomancy tradition as it existed independently of Etteilla.