Persia held sway over a huge district of India—­the limits of this are not known; but, in addition, they were well acquainted with a large portion of the north-western part of India.

The traditions and historical records of the Persians are contained in the famous series of writings culled the Zend-avesta.  These writings are, it is thought, of an age even before the Persian dynasty was established; and it has been shown by the researches of M. Anguetil and Sir W. Jones that there is indeed a great probability of the Zend having been a dialect of the ancient Sanscrit language.  In the vocabulary attached to M. Anguetil’s great work on the Zend-avesta no less than 60 to 70 per cent. of the words are said to be pure Sanscrit.

As the oldest known language of Persia was Chaldaeic, we are again thrown back on Indian sources for the origin of the great book of the ancient Persians.  Even the name of the priests of the Persian religion of Zoroaster, Mag or Magi, is of Sanscrit derivation.

The Persians kept up an enormous army, which was spread through all the various provinces and Satrapies, and consisted in great part of paid auxiliaries.  In at least the later period of Persian power the Greeks were preferred to all others, and in the time of Cyrus the Younger they composed the flower of the Persian army, and were employed in garrisoning most of the chief cities of Asia Minor.

The description given by Herodotus of the vast army and fleet prepared for the expedition of Xerxes against the Greeks gives us an idea of the extent of the Persian power, and of the wide range of countries and nations over which they held sway.  The review held on the Plain of Doriscus was perhaps the greatest military spectacle ever beheld either before or since.  Herodotus enumerates no less than 56 different nations, all of them in their national dress and arms.  Besides the Persians there were “Medes and Bactrians; Libyans in war chariots with four horses; Arabs on camels; Sagartians, wild huntsmen who employed, instead of the usual weapons of the time, the lasso; the nomadic tribes of Bucharia and Mongolia; Ethiopians in lions’ skins, and Indians in cotton robes; Phoenician sailors, and Greeks from Asia Minor.”  All these and many others were there assembled by the despotic power of the Persian king.

The system of government employed by the Persians, and the constant reports and tributes sent from every province to the central court of the king, were well calculated to bring to it, as to a focus, the curious lore of the various nations who came in contact with or were subdued by them.

The Persians were famed for their knowledge of astronomy and astrology, and were said “to have anciently known the most wonderful powers of nature, and to have therefore acquired great fame as magicians and enchanters.”