A previous subtitle to this letter was "copy of the long-lost Verrazzano letter to Francis I, King of France, 16th century."
The Cèllere Codex; so-called because it was found in the library of Count Macchi di Cèllere in Rome, 1908 and referred to as the R. Codex.
Bacchiani believes that it is in the hand of Girolamo, with marginal notes by Giovanni Verrazzano himself.
Giving a preliminary report of his voyage along the East Coast of North America in 1524. This manuscript is addressed to Bonacorso Rucellay, a business associate of Verrazzano's brother Girolamo.