Annalists were appointed in each of the principal communities, whose business it was to record the most important events which occurred in them. Other functionaries of a higher character, usually the amautas, were intrusted with the history of the empire, and were selected to chronicle the great deeds of the reigning Inca, or of his ancestors. *6 The narrative, thus concocted, could be communicated only by oral tradition; but the quipus served the chronicler to arrange the incidents with method, and to refresh his memory. The story, once treasured up in the mind, was indelibly impressed there by frequent repetition. It was repeated by the amauta to his pupils, and in this way history, conveyed partly by oral tradition, and partly by arbitrary signs, was handed down from generation to generation, with sufficient discrepancy of details, but with a general conformity of outline to the truth. [Footnote 6: Ibid., ubi supra.] The Peruvian quipus were, doubtless, a wretched substitute for that beautiful contrivance, the alphabet, which, employing a few simple characters as the representatives of sounds, instead of ideas, is able to convey the most delicate shades of thought that ever passed through the mind of man. The Peruvian invention, indeed, was far below that of the hieroglyphics, even below the rude picture-writing of the Aztecs; for the latter art, however incompetent to convey abstract ideas, could depict sensible objects with tolerable accuracy. It is evidence of the total ignorance in which the two nations remained of each other, that the Peruvians should have borrowed nothing of the hieroglyphical system of the Mexicans, and this, notwithstanding that the existence of the maguey plant, agave, in South America might have furnished them with the very material used by the Aztecs for the construction of their maps. *7 [Footnote 7: Ibid., ubi supra. - Dec. de la Aud. Real., Ms. - Sarmiento, Relacion, Ms., cap. 9.