Amerigo Vespucci participated as observer in four Spanish and Portuguese exploratory voyages. The expeditions became widely known in Europe after two accounts attributed to him, published between 1502 and 1504. His last two voyages to the east and southern east coasts of South America, by Portugal, especially the expedition of 1501–1502 to Brazil and beyond, and its meeting with Cabral's ships and men (who had touched the South American, African and Asian continents) on the African coast, at Bezeguiche (the bay of Dakar, Senegal), listening the accounts of its sailors (then returning to Portugal), were the most decisive for his "New World" hypothesis. Vespucci suggested that the newly discovered lands (especially what is today South America/Brazil) were not the Indies but a "New World", the "Mundus novus", Latin title of a contemporary document based on Vespucci letters to Lorenzo di Pierfrancesco de' Medici, which had become widely popular in Europe.