A biography of Fernando de la Torre (especially his journeys and "fights") would be helpful, also the identity of the comtessa ... perhaps he accompanied Cartagena, perhaps he was involved in the Naples-story 1442.
We've to reflect, that the Spanish interests in Italy made a big jump with Alfonso's success in Naples. And the pope in 1455 already was Spanish, later followed by Borgia.
I wonder, if Angelo Decembrio's (who wrote about the discussions between Leonello-Guarino-Alberti-Tito Vespasiano Strozzi) journey to Spain (Saragossa) in 1450 has anything to do with it.
Strozzi is Boiardo's uncle ... !!!!!
Strozzi (* 1424) is rather young in 1450 ... can we assume, that Angelo Decembrio (* 1418) was befriended closely with him ? Strozzi's appearance beside Leonello - Guarino - Alberti would otherwise be a surprize.
Angelo's journey (actually a flight) in 1450 surely has something to do with the fear of danger by Sforza's victory in Milan, the elder brother Pier Candid Decembrio had engaged for the Ambrosian republic - it was not predictable, how Sforza would behave. It's told, that Angelo was back in Ferrara in in October 1450, when Leonello died.
The distance Saragossa-Burgos are 315 km ... that's not far. Cartagena probably had been in Ferrara (?) during the council ... Angelo should have had opportunity to meet him. In the case, that Fernando de la Torre accompanied Cartagena, then there was opportunity for a meeting between young poet Angelo and young poet Fernando (* 1416) and perhaps even the younger poet Tito Vespasiano Strozzi was between them.
Well ... still I desire to see something more of this text of Angelo Decembrio about the Ferrarese talkings. Ah, lucky life and thanks to books.google.com ......
http://books.google.com/books?id=H49KIQyId0IC
...
..well, mostly everything in Latin, but I can decipher from the German prolog ...
Feltrino Boiardo (presents a stormy person according description))
Alberto Costabili / Alberto da Carpi with love to Livius)
Tito Strozzi (loves Dante)
Giovanni Gualengo (with wisdom)
Mapheus Vegius (= Maffeo Vegio)
Aretino (= Leonardo Bruni)
Pogius (= Poggio)
Francesco Venerio (Venetian diplomat)
(diplomats of Florence)
Giovanni Pietrasanti (fugitive from Milan, dies)
funny accidently visitors:
Minorit Agostino
Actor Ugolino da Parma
Techer Palamedes
Messenger of Pope Eugen
....
....
But the similarity between Boiardo text and Torre poem gets with the Angelo-Decembrio-journey precisely at the right time (1450) a logical face.