Hi Dave -
It's practically impossible to make any kind of final determination, since the whereabouts of the cards, if they still exist, are unknown, and I don't know of anyone who's actually seen Marziano's descriptive book. Somebody could do the world a great service by getting access to this book (it's in the Bibliotheque Nationale), translating it, and posting the contents on the web.
I had a chance to look at the book for a few hours in Paris last March, and I can give a brief description of it. I had time to copy out only part of the introduction and the first chapter, on Jove. As for translating it, that will take some time
Lothar has given a very fine summary, based on Pratesi's article, at his page.
It is small, approximately 21x14x2.5 cm. Bound in a red velvet cover that has faded considerably - it looks original to me: there are no signs that the book has been rebound, and it is in very good condition, not much studied over the centuries, I guess.
There are two treatises in Latin in the volume, each written in a similar fine hand, in blue ink, with illuminated capitals at each chapter/paragraph head (either blue and gold or green and gold). There are no illustrations anywhere in the volume.
(1) Tractatus de deificatione sexdecim heroum (fols. 1-31v)
(2) Paulus Vergerius de liberalibus studiis ac ingenues moribus [Concering Liberal Studies and Noble Morals].
The theme of the volume is virtue and education.
Number 2 is a text on education and its value, which is available in translation on the internet at
http://history.hanover.edu/project.html . It was written around 1404, and was very popular in its time.
Number 1 is the text we are interested in. It varies between 16 and 17 lines per page, approximately 8 words per line, thus around 7600 words. Probably a few hundred less, given the spaces between paragraphs etc.
As Pratesi observed, it begins with a letter from Iacopo Antonio Marcello to Isabelle of Lorraine, wife of René, Duke of Anjou, King of Sicily, etc. It begins "Serenissimae Isabellae Reginae Augustissimae Iacobus Antonius Marcellus humiliter" -"To the most serene Isabella, most august Queen, Iacopo Antonio Marcello, humbly."
The introductory letter runs for three pages, from fols. 2v-4r. Dummett must not have read the text, for he incorrectly asserts that "there is no use of the word *triumphi* in reference to the cards" in the letter (Game of Tarot, 82). In fact, Iacopo Antonio Marcello does use the word "triumphum" in this manner in the letter, which Pratesi observed and Lothar reports on his site.
The text of Maritanus de Sancto Alosio (Marziano da Tortona) begins on fol. 4v. His introduction is well summarized by Pratesi, again presented on Lothar's site. Marziano himself does not use the word triumphum, nor even chartas. I was not able to read the whole book closely, but he does mention a particular triumph, that of Julius Caesar, on fol. 27r in the chapter on Hercules.
There's some question in my mind as to whether the cards with gods were trumps or court cards. However, the fact that a well-known contemporary player referred to these cards as a "trionfi" pack was new and very valuable information to me.
I think that the gods were certainly seen as a class apart, with their own ranking. Marziano's introduction mentions this, and is summarized at Lothar's page.
You can read what I've written about this deck at
http://www.tarotseeker.com/Born.html
There's also an excellent article about the significance of these cards at Tom Tadfor Little's site,
www.tarothermit.com/marziano.htm
Nice summary. The description of the birds is limited to saying what virtues they symbolize (For the most part it is clear, but the Phoenix with Riches is obscure - I haven't found out why yet) and that two run one way, two another, and that no suit is higher than another.
Tom's page is what alerted me to the existence of the Marziano's book.
Best always,
Ross