At all events, there are facts which prove that certain astronomical calculations were as correct with the Chaldeans in the days of Julius Cæsar as they are now. When the calendar was reformed by the Conqueror, the civil year was found to correspond so little with the seasons, that summer had merged into the autumn months, and the autumn months into full winter. It was Sosigenes, the Chaldean astronomer, who restored order into the confusion, by putting back the 25th of March ninety days, thus making it correspond with the vernal equinox; and it was Sosigenes, again, who fixed the lengths of the months _as they now remain_. In America, it was found by the Motezuman army, that the calendar of the Aztecs gave an equal number of days and weeks to each month. The extreme accuracy of their astronomical calculations was so great, that _no error_ has been discovered in their reckoning by subsequent verifications; while the Europeans, who landed in Mexico in 1519, were, by the Julian calendar, nearly eleven days in advance of the exact time. It is to the priceless and accurate translations of the Vedic Books, and to the personal researches of Dr. Haug, that we are indebted for {12} the corroboration of the claims of the hermetic philosophers. That the period of Zarathustra Spitama (Zoroaster) was of untold antiquity, can be easily proved. The _Brahmanas_, to which Haug ascribes four thousand years, describe the religious contest between the ancient Hindus, who lived in the pre-Vedic period, and the Iranians. The battles between the _Devas_ and the _Asuras_—the former representing the _Hindus_ and the latter the Iranians—are described at length in the sacred books. As the Iranian prophet was the first to raise himself against what he called the “idolatry” of the Brahmans, and to designate them as the _Devas_ (devils), how far back must then have been this religious crisis? “This contest,” answers Dr. Haug, “must have appeared to the authors of the _Brahmanas_ as old as the feats of King Arthur appear to English writers of the nineteenth century.”