The letter and an accompanying book from Martiano da Tortona were translated by Ross Caldwell:
Letter ... http://trionfi.com/jacopo-marcello-letter-1449
Book ... http://trionfi.com/martiano-da-tortona-tractat
Some data of earlier research (c. 2005) had been summarized at ...
A relevant note, according which Scipio Caraffa had been a Venetian diplomat in 1446 at the French court, is online now:
M. Vallet de Viriville, "Histoire de Charles VII, Roi de France, et de son époque 1403-1461" (1865)
http://books.google.de/books?id=EktF5Hv ... 22&f=false
Recently some new material to Scipio Carafa was detected (by Phaeded and myself).
Dutch genealogical record
http://www.genealogieonline.nl/west-eur ... 840925.php
According this a "Scipio Carafa" had been Signore in Pascarola (nowadays a part of the city Caivano, 14 km northeast of Naples).
Scipio Carafa is there son of a Galeotto Carafa (died 1415), and a grand-son of Andrea, Signori di Forli, Signore of Forli (this should be not the Forli near Imola and Faenza, but a much smaller Forli del Sannio in the Abruzzen, North of Isternia, which should be the home place of the grand-grand-mother Giovanna d'Isernia. Other places given in the family records belong to the same region, high in the mountains of the abruzzen and controlling the passes likely.
There is also a German/English genealogical record.
http://www.geni.com/people/Andrea-Caraf ... 0742455205
The grandfather Andrea di Carafa has in this record died in the year 1384 (in the Dutch record he has no date). He has in this record no son with the name Galeotto, and consequently also no grand-son Scipio.
Phaeded detected a Scipio Carafa in a treccani article abot "Galeotto Carafa"
http://www.treccani.it/enciclopedia/gal ... ografico)/
I've difficulties to understand this text. Is it Galeotto or Scipio, who is born c. 1415? I assume, it's Galeotto and Scipio is just the father, about whom nothing is told.... l'altro Galeotto signore di Pascarola, figlio di Scipione, o, secondo l'Aldimari, di Andrea, nato nell'anno 1415 circa. Quest'ultimo fu uomo d'arme e capitano di Sulmona nel 1455. Alla morte di Alfonso I d'Aragona si schierò contro Ferdinando, il quale nel 1460 gli tolse la metà del feudo di Pasacarola, che Galeotto aveva ricevuta in eredità dal padre. Nel 1465 divenne capitano de L'Aquila, dove rimase fino al 1469. Intorno a quest'epoca acquistò Civitaluparella, il cui possesso fu confermato dal sovrano agli eredi il 5 nov. 1486. Sposò Rosata di Pietramala, da cui ebbe sei figli; il primogenito, Andrea, fu il primo conte di Santa Severina. Morì nel 1486 ed il figlio maggiore nel 1513 gli fece porre una lapide in S. Domenico Maggiore in Napoli.
A solution to this contradicting information might be, that the earlier Galeotto (dying 1415) had been an illegitimate son or a son in second marriage of Andrea, the grand-father (which might be an easy reason to appear not in the English/German genealogy). Scipio with a son Galeotto in c. 1415 should have been born 1395-1400 at least. He might have been Signore of Pascarola till 1442, and then went possibly with Renee d'Anjou into exile to Provence, as it happened also with Giovanni Cossa, who appears also in the Marcello documents.
http://trionfi.com/giovanni-cossa-messe ... ee-d-anjou
Giovanni Cossa himself was then on the side of the Anjou as his father and uncle, the pope, and he became a leading figure for the Anjou party in the city, defending the Anjou’s interest in Naples till the end in 1442, but he had to capitulate finally, when Alfonso d'Aragon took Naples. Together with Rene d'Anjou and some other companions (Ottino Caracciolo and Giorgio della Magna are mentioned) on 2 Genuese ships he left the city, taking refuge in Florence. He is pardoned in Naples 1/2 year later in Naples by Alfonso, but leaves the city finally in 1448 to Rene in France. There he became enlisted in the just builded Order of the Crescent as Nr. 3, probably it's true, that he helped to found the institution, perhaps it was even his idea or an idea born just by the meeting of Rene and Cossa.
As a possible reason for Scipio Carafa to be chosen as a Venetian diplomat might be just the reason, that he had good access to Renee d'Anjou and knew, how to speak French by his earlier contact.
There's the interesting observation, that the grand-mother of Scipio, Maria di Cornay, had been the daughter of a Peter of Cornay, and Cornay is a French region in the Ardennes, close to Bar and Lorraine (where Peter of Cornay likely came from, probably as a noble knight in the early 1300s; Bar and Lorraine were early regions for Renee d'Anjou). This condition might have opened some French language to the descendents of the family and a natural good contact to the Anjou, which reigned in Naples for a long period already in 13th/14th century. Peter of Cornay had married the Italian girl from Isernia, Giovanni d'Isernia, who died in 1352 (according the German/English genealogy).
Peter of Cornay aka Pietro di Cornay should be an Italian name, the original French name might be quite different.