2. ZENDIC LITERATURE.--To the first period belong the ancient sacred books of Persia, collected under the name of _Zendavesta_ (living word), which contain the doctrines of Zoroaster, the prophet and lawgiver of ancient Persia. The Zendavesta is divided into two parts, one written in Zend, the other in Pehlvi; it contains traditions relating to the primitive condition and colonization of Persia, moral precepts, theological dogmas, prayers, and astronomical observations. The collection originally consisted of twenty-one chapters or treatises, of which only three have been preserved. Besides the Zendavesta there are two other sacred books, one containing prayers and hymns, and the other prayers to the Genii who preside over the days of the month. To this first period some writers refer the fables of Lokman, who is supposed to have lived in the tenth century B.C., and to have been a slave of Ethiopic origin; his apologues have been considered the model on which Greek fable was constructed. The work of Lokman, however, existing now only in the Arabic language, is believed by other writers to be of Arabic origin. It has been translated into the European languages, and is still read in the Persian schools. Among the Zendic books preserved in Arabic translations may also be mentioned the "Giavidan Kird," or the Eternal Reason, the work of Hushang, an ancient priest of Persia, a book full of beautiful and sublime maxims. 3. PEHLVI AHD PARSEE LITERATURES.--The second period of Persian literature includes all the books written in Pehlvic, and especially all the translations and paraphrases of the works of the first period. There are also in this language a manual of the religion of Zoroaster, dictionaries of Pehlvi explained by the Parsee, inscriptions, and legends. When the seat of the Persian empire was transferred to the southern states under the Sassanides, the Pehlvi gave way to the Parsee, which became the prevailing language of Persia in the third period of its literature. The sacred books were translated into this tongue, in which many records, annals, and treatises on astronomy and medicine were also written. But all these monuments of Persian literature were destroyed by the conquest of Alexander the Great, and by the fury of the Mongols and Arabs. This language, however, has been immortalized by Ferdusi, whose poems contain little of that admixture of Arabic which characterizes the writings of the modern poets of Persia.