600.
Brahmana period, " " 600 " 800.
Mantra period, " " 800 " 1000.
Chhandas period, " " 1000 " 1200.
Dr.Haug, a high authority, considers the Vedic period to extend from B.C.
1200 to B.C.2000, and the very oldest hymns to have been composed B.C.
2400.
The principal deity in the oldest Vedas is Indra, God of the air.

In Greek he becomes Zeus; in Latin, Jupiter.

The hymns to Indra are not unlike some of the Psalms of the Old Testament.

Indra is called upon as the most ancient god whom the Fathers worshipped.

Next to India comes Agni, fire, derived from the root Ag, which means "to move."[46] Fire is worshipped as the principle of motion on earth, as Indra was the moving power above.