RIG VEDA - The oldest of the ved‡s dates from about 4000 B. C. It was recited, at first, in a monotone and later developed to three tones (one main tone, two accents, one higher and the other lower called Udatta and Anudatta respectively).
A text summary of the clickable map above, meant for web-crawlers and other automatic tools:
Rig Veda is example of vedas