These means of information were much enlarged by Sarmiento's visit to the colonies, during the administration of Gasca. Having conceived the design of compiling a history of the ancient Peruvian institutions, he visited Cuzco, as he tells us, in 1550, and there drew from the natives themselves the materials for his narrative. His position gave him access to the most authentic sources of knowledge, and from the lips of the Inca nobles, the best instructed of the conquered race, he gathered the traditions of their national history and institutions. The quipus formed, as we have seen, an imperfect system of mnemonics, requiring constant attention, and much inferior to the Mexican hieroglyphics. It was only by diligent instruction that they were made available to historical purposes; and this instruction was so far neglected after the Conquest, that the ancient annals of the country would have perished with the generation which was the sole depositary of them, had it not been for the efforts of a few intelligent scholars, like Sarmiento, who saw the importance, at this critical period, of cultivating an intercourse with the natives, and drawing from them their hidden stores of information. To give still further authenticity to his work, Sarmiento travelled over the country, examined the principal objects of interest with his own eyes, and thus verified the accounts of the natives as far as possible by personal observation. The result of these labors was his work entitled, "Relacion de la sucesion y govierno de las Yngas Senores naturales que fueron de las Provincias del Peru y otras cosas tocantes a aquel Reyno, para el Iltmo. Senor Dn Juan Sarmiento, Presidente del Consejo Rl de Indias." It is divided into chapters, and embraces about four hundred folio pages in manuscript. The introductory portion of the work is occupied with the traditionary tales of the origin and early period of the Incas; teeming, as usual, in the antiquities of a barbarous people, with legendary fables of the most wild and monstrous character. Yet these puerile conceptions afford an inexhaustible mine for the labors of the antiquarian, who endeavors to unravel the allegorical web which a cunning priesthood had devised as symbolical of those mysteries of creation that it was beyond their power to comprehend. But Sarmiento happily confines himself to the mere statement of traditional fables, without the chimerical ambition to explain them.