Benalcazar had conquered Quito in the name and under the authority of Pizarro, and the latter now named his brother Gonzalo governor. Confident of finding another Peru in the unknown regions to the east of his new domain, the young Pizarro enlisted hundreds of adventurers, and in the beginning of 1541 led the largest and best-equipped expedition yet assembled in South America down the declivities of the Andes. Difficulties began as soon as he reached the sweltering, steaming forest region. Rain fell unceasingly; the soft clay of the defiles afforded no footing; instead of finding stone highways like those over which they had marched in their conquest of the table-land, the Spaniards had to cut tracks along the mountainsides through the matted vegetation. Provisions ran short, clothes rotted, arms rusted, no villages or tribes possessing food were encountered. Finally Gonzalo was obliged to halt the main body, sending a detachment under Orellana, the second in command, on ahead to find provisions. Orellana followed down a stream which soon grew large enough to be navigable. He built boats and proceeded, but still found no signs of civilised inhabitants. Fearing that he could never ascend the river to the main body, he determined to keep on, confident that ultimately he must reach the ocean. The river he was descending is now called the Napo. After a course of nearly a thousand miles, it flowed into the Amazon, and down the latter's broad current Orellana and his little band floated to the Atlantic, there built a little ship, and finally made their way to Spain. Hearing nothing of Orellana, Gonzalo gave up and climbed back to Quito with a starving and naked remnant of his men. There he learned of the assassination of his great brother at Lima, and that Vaca de Castro, the royal commissioner appointed to settle the disputes between the partisans of Almagro and Pizarro, had passed through Ecuador on his way south to Peru, appointing another governor for Quito. Gonzalo retired to Charcas in southern Bolivia, whence he emerged a year later to head the great rebellion. The viceroy was compelled to fly from Lima, and landing at Tumbez made his way to Quito. The Spaniards in Ecuador and southern Colombia were against Pizarro, but the latter chased the viceroy out of Quito and north into Popayan, where Benalcazar took sides with him. Four hundred Spaniards accompanied the viceroy in a counter-invasion, but near the city he was completely defeated and decapitated as he lay wounded on the field. Gonzalo, now undisputed lord of the whole Inca empire, returned at his leisure to Lima. The tale of how Gasca, shrewd old priest, by intrigue and conciliation, re-established royal authority and brought Pizarro to the scaffold, does not especially affect the history of Ecuador.