CHAPTER XXIV.
Prince Henry of Portugal.--Discovery of Porto Santo and Madeira. --Doubling of Cape Bojador.--Discovery of the Cape Verde Islands. --Bartholomew Diaz.--Vasco de Gama.--Columbus.--His Predecessors. --Discovery of Greenland by Günnbjorn.--Bjorne Herjulfson.--Leif. --John Vaz Cortereal.--John and Sebastian Cabot.--Retrospective View of the Beginnings of English Navigation.--Ojeda and Amerigo Vespucci.--Vincent Yañez Pinson.--Cortez.--Verazzani.--Cartier. --The Portuguese in the Indian Ocean 454