Books such as those here described by Las Casas must have contained important historical information. The older books, belonging to the ages of Copan and Palenque, went to decay doubtless long previous to his time, in the wars and revolutions of the Toltec period, or by the wear of time. The later books, not otherwise lost, were destroyed by Aztec and Spanish vandalism. According to tradition, and the testimony of writings still in existence when the Spaniards went there, the Aztec or Mexican sovereign Ytzcoatl destroyed many of the old Toltec books. His aim was probably to exterminate among the people all memory of the previous times. Such things have been done with similar motives, as we know, in other countries, by successful usurpers and conquerors. We learn from Spanish writers that a still greater destruction of the old books was effected by the more ignorant and fanatical of the Spanish priests who were established in the country as missionaries after the Conquest. This is stated by Las Casas, himself one of the missionaries. Besides the many smaller bonfires of this fanaticism, there is record of a great conflagration, under the auspices of Bishop Zumarraga, in which a vast collection of these old writings was consumed. As the writing was all on paper (which had long been used in the country), the burning was easily accomplished. THE OLD BOOKS NOT ALL LOST. The Franciscan and Dominican fanatics, whose learning and religion consisted of ignorance and bigotry, hoped to exterminate among the people all recollection of their former history, ideas, and religious customs. A few of the books, however, escaped; none, indeed, that were very old, for it does not appear that any of the manuscripts rescued from destruction were written or copied earlier than the age which closed the Aztec domination. None of the great books of annals described by Las Casas are among them, but they relate to the ancient times, and most of them are copies or reproductions of much older books. [Illustration: Fig. 49.--Inscriptions carved on Stone.]