Sebastian, his elder brother Ludovico and his younger brother Santo were included by name with their father in the royal letters patent from King Henry VII of March 1496 authorizing their father's expeditions across the Atlantic [REF].
According to Cartografía Marítima Hispana,[REF] Sebastian Cabot included a handwritten text in Latin on his famous map of North America (published in Antwerp, 1544) claiming to have discovered North America with his father in 1494, three years before his father's voyage [REF].