In spite of these precautions, the end seems to have been very imperfectly attained. The most distinguished characters, the weightiest events in national history faded into oblivion after a few generations. The time and circumstances of the formation of the league of the Five Nations, the dispersion of the mound builders of the Ohio valley in the fifteenth century, the chronicles of Peru or Mexico beyond a century or two anterior to the conquest, are preserved in such a vague and contradictory manner that they have slight value as history. Their mythology fared somewhat better, for not only was it kept fresh in the memory by frequent repetition; but being itself founded in nature, it was constantly nourished by the truths which gave it birth. Nevertheless, we may profit by the warning to remember that their myths are myths only, and not the reflections of history or heroes. Rising from these details to a general comparison of the symbolic and phonetic systems in their reactions on the mind, the most obvious are their contrasted effects on the faculty of memory. Letters represent elementary sounds, which are few in any language, while symbols stand for ideas, and they are numerically infinite. The transmission of knowledge by means of the latter is consequently attended with most disproportionate labor. It is almost as if we could quote nothing from an author unless we could recollect his exact words. We have a right to look for excellent memories where such a mode is in vogue, and in the present instance we are not disappointed. "These savages," exclaims La Hontan, "have the happiest memories in the world!" It was etiquette at their councils for each speaker to repeat verbatim all his predecessors had said, and the whites were often astonished and confused at the verbal fidelity with which the natives recalled the transactions of long past treaties. Their songs were inexhaustible. An instance is on record where an Indian sang two hundred on various subjects.[18-1] Such a fact reminds us of a beautiful expression of the elder Humboldt: "Man," he says, "regarded as an animal, belongs to one of the singing species; but his notes are always associated with ideas." The youth who were educated at the public schools of ancient Mexico--for that realm, so far from neglecting the cause of popular education, established houses for gratuitous instruction, and to a certain extent made the attendance upon them obligatory--learned by rote long orations, poems, and prayers with a facility astonishing to the conquerors, and surpassing anything they were accustomed to see in the universities of Old Spain. A phonetic system actually weakens the retentive powers of the mind by offering a more facile plan for preserving thought. "_Ce que je mets sur papier, je remets de ma mémoire_" is an expression of old Montaigne which he could never have used had he employed ideographic characters.