In the spring of 1528 Pizarro sailed for Spain, where he had an interview with king Charles I. The king heard of his expeditions in lands rich in gold and silver and promised to support him. The "Capitulación de Toledo" authorized Pizarro to proceed with the conquest of Peru. Pizarro was then able to convince many friends and relatives to join: his brothers Hernándo Pizarro, Juan Pizarro, Gonzalo Pizarro and also Francisco de Orellana, who would later explore the Amazon River, as well as his cousin Pedro Pizarro.