According to the popular belief, gold consisted of tears wept by the sun and was therefore a sacred metal suitable for beautifying the palaces of the Incas and temples of worship. Not only were the edifices themselves richly adorned with this precious metal, but the sacred vessels and many of the articles of furniture were made of the same material. Silver, also, was much used, but was not considered sacred. So great was the amount of the precious metals used that each royal palace and temple was a veritable mine. From 1520 to 1525 reports of a rich empire at the south were circulated among the adventurers congregated at Panama. At length they were confirmed in a great measure by travellers who had voyaged southward along the coast. Francisco Pizarro, a restless spirit who had been associated with Balboa and others in discovery and exploration, determining to test the truth of these reports, made several voyages south. Finally, he landed on the shores of Peru with an army of followers who numbered less than two hundred. He met with but little opposition from the natives while marching toward the interior, and although he plundered some of the places through which he passed, the people received him with marks of friendship. In some instances towns of several thousand population were deserted on the approach of the Spaniards, so great was the terror inspired by the white men, especially by those on horseback. At first it was the policy of the invaders to treat the natives with kindness in order to accomplish their purpose, namely, to conquer the Peruvian Empire in the same manner that Cortez had conquered the Aztecs. They were accompanied by two of the natives who previously had been taken to Spain and taught the Spanish language. By this means the Spaniards were able to communicate with the people. Learning that the Inca ruler, Atahuallpa, was encamped with his army among the mountains, Pizarro sent an embassy to request a meeting with him. It was agreed that they meet at Caxamalca, a strongly fortified city among the sierras. On arriving at the city, the Spaniards found it evacuated. Soon after taking up their quarters there, Atahuallpa arrived and established his camp a short distance outside the city. Pizarro at once sent word to Atahuallpa to come into the city and sup with him, but asked that, in order to show his faith in the white men and his own good intentions, he should leave all weapons behind. After much persuasion Atahuallpa accepted the invitation and entered the city, with several thousand of his followers, unarmed. When fairly within the enclosure, a priest approaching the Inca ruler made a harangue about Christianity and demanded that he should submit to the authority of the Spanish king. "By what authority do you demand such submission?" replied the monarch with flashing eye. "By this holy book which I hold in my hand," answered the priest.