 Complete the following phrase:  In 1481, Alvise Cadamosto was elected captain of the Venetian Alexandria galley fleet, ending his naval career on the same ships where he started. He died in 1483, in the Polesine, while on diplomatic mission to Rovigo to assess the spoils acquired by the Venetian Republic after their victory over Ercole I dEste, Duke of Ferrara in the 