Vasco Nunez de Balboa (c 1475-1519), an adventurer from Jerez de los Caballeros in Estremadura, western Spain, had led the life of colonist and conquistador in Colombia and Hispaniola from 1501. In 1511 he was appointed governor of the colony of Santa Maria de la Antigua on what is now called the coast of Panama. He left the colony on 1 September 1513 with an expedition of 200 Spaniards and indigenes, and headed inland, fighting with the indigenous inhabitants and struggling through dense jungles and swamps. On 25 or 27 September he reached a peak from which he could see the “South Sea”. His expedition reached the coast four days later and Balboa claimed the ocean and all it touched for the King of Spain. Balboa returned to …
Editors. "Balboa crosses the Isthmus of Panama and sees the Pacific". The Literary Encyclopedia. First published 07 May 2008; last revised 30 November -1.
[http://www.litencyc.com/php/stopics.php?rec=true&UID=5555, accessed 21 April 2015.]