The extent and intervals of the _Sixth age_ according to Eusebius in his Chronicon, were obtained from the same sources as before, see p. 286. He dates the proclamation of Cyrus in the 30th year of the Captivity, and his death in the 60th year. He next dates the 70th year of the Captivity in the 2nd of Darius Hystaspes, and thus annihilates 40 years of the Persian Empire before that epoch; consequently, only 190 years remained after it, as he reckons the whole period 230 years. He next reckons 6 years of the reign of Alexander the Great, independently of the Grecian Empire, which he estimates at 295 years under the Ptolemies; thus making the whole period of the Macedo-Grecian empire 301 years. Lastly, he dates the Birth of Christ in the 42d year of Augustus Cæsar, his 15th year being reckoned coincident with the 22d of Cleopatra, the last of the Ptolemies; hence, the period from the end of the Grecian Empire to the Christian era, is 27 years, and the extent of the whole period under discussion, 588 years. Thus Eusebius, by an admixture of the Hebrew and Septuagint Chronologies in his Canon, makes the period from Creation to the Christian era, 5199 years. The intervals and extent of the _Sixth age_, according to the author of the Paschal Chronicle, were obtained from his work, see p. 286. He follows Eusebius in his epochs of the 1st of Cyrus and the end of the Captivity; but he reckons the whole period of the Persian Empire at 246 years, and thus makes the remainder 206 years after the Captivity. He estimates the period of the Grecian Empire at 296 years, including Alexander; and the reign of Augustus Cæsar as sole Emperor, at 44 years; thus making the period from the end of the Grecian empire to the birth of Christ 29 years, and the extent of the whole period in question, 601 years. According to this author, therefore, by the summation of his periods the number of years from the Creation to the Christian era, is 5512; but he states it himself at 5507 years. He seems to have obtained this period, by annihilating 2 years in the extent of the 4th age and 3 years in that of the 5th age, in order to make it coincide with that of Theophilus. The following table exhibits the summation of the _Six ages_ of the world, according to their extent, as determined in the preceding pages, from the works of the ancient chronographers; including those of the Septuagint, with the _Sixth age_ as determined by the Canon of Ptolemy.