Notwithstanding the enormous quantities of gold and silver found in Peru, the crowds of needy treasure-seekers who went to that country gave some trouble to the Viceroy, who appears to have been willing to get rid of them at any cost. Whether he purposely sent them on a "wild goose chase," or whether he really believed the "El Dorado" story, is doubtful, but it is certain that he thought it prudent to give them employment in some way, to prevent mischief in his province. The expedition was put in command of Pedro de Ursua, and was intended to go down the Amazon in search of treasure cities. Embarking on the river Huallaga, in the year 1560, they had hardly passed the mouth of Ucayali before Ursua found he had a most unprincipled gang of scoundrels under his command. A little farther down the river they mutinied, under the leadership of Lope de Aguirre, and murdered Ursua and his lieutenant, appointing Guzman as captain. Being dissatisfied, however, with their new commander, they also killed him a little later, together with most of his adherents. Now Aguirre became leader--a ruffian whose character was of the blackest. Father Pedro Simon delineates his features and character, making him out to be a very devil. He was about fifty years of age, short of stature and sparsely built, ill-featured, his face small and lean, his beard black, and his eyes as piercing as those of a hawk. When he looked at any one he fixed his gaze sternly, particularly when annoyed; he was a noisy talker and boaster, and when well supported very bold and determined, but otherwise a coward. Of a very hardy constitution, he could bear much fatigue, either on foot or horseback. He was never without one or two coats of mail or a steel breastplate, and always carried a sword, dagger, arquebuse, or lance. His sleep was mostly taken in the day, as he was afraid to rest at night, although he never took off his armour altogether nor put away his weapons. Simon said he had always been of a turbulent disposition; a lover of revolts and mutinies; an enemy to all good men and good actions. Such was the Tyrant or Traitor Aguirre--virtually a madman--who now became the leader of a band of wretches like-minded to himself. They journeyed down the mighty river, now and again murdering one or another of the party, on the least suspicion of their dislike to their proceedings, and ill-treating the natives everywhere.