Pascual de Andagoya was one of the officers who accompanied Pedrarias, when he went out as governor of the newly discovered isthmus between the North and South Seas in 1514. Andagoya was engaged in several of the exploring expeditions which were despatched from Darien, and he was the first Spaniard who obtained authentic information respecting the rich empire of the Yncas. His discoveries led to the expeditions of Pizarro and Almagro, and Andagoya himself was eventually governor, for a very short time, of the provinces round Popayan. His narrative is that of an eye-witness of some of the most stirring events which preceded the discovery of Peru. The conquest of the isthmus and the establishment of a colony at Panama were the necessary preliminaries to Spanish dominion along the shores of the South Sea. An account of these events, written by one of the actors in them, therefore, possesses peculiar interest, and the narrative of Pascual de Andagoya has accordingly been deemed worthy of a place in the series of volumes printed for the Hakluyt Society.

A famous discovery had been made, before the arrival of Pedrarias and his train of officers and lawyers, by one of the greatest men that the age of Spanish conquest in America produced. Vasco Nuñez de Balboa, in March 1511, found himself the leading and most popular man in the forlorn colony of Darien. The expeditions of Nicuesa and Ojeda had failed, chiefly through the incompetence of their unfortunate leaders. The man who, a few short months before, had been a fugitive debtor headed up in a cask, was now the commander of a great enterprise.