Search for Dravidians and Elamites in the Dharmawheel search function for related posts.
Also: Mohenjodaro or Mohenjo-Daro.
As I've mentioned before, Samten Karmay's mentioning of the Little Black-Headed Man of Tibet in The Arrow and the Spindle is way interesting, considering that the Sumerians (who were in contact with the Elamites and Dravidians) were known as the Black-Headed Ones.
There may even be some relation here to the Pygmy forms of the Khemetian and Æthiopian Deities Asar or Asaur, Heru, and Bes, Bas, or Basu. Although I don't know if anyone else besides myself has thought of this latter theory.
I believe that Tamils, Dalits, and Chandalas & Chandalis are all or mostly Dravidian too.
The quote in my signature from Godfrey Higgins could be another clue here as well.
Without clairvoyance, we cannot work for other sentient beings - Khunu Lama
Suddenly you will know the different knowledge without study - Thog-'bebs
One may now accomplish the welfare and instruction of all sentient beings, spontaneously and without effort, by simply being, that is to say, by manifesting one's enlightened nature through spontaneously emanating an infinity of Nirmanakaya manifestations - Vajranatha