"First of all, many Indian tribals do practise linga worship. Pupul Jayakar (whose work is admittedly coloured by AIT assumptions) situates both Shiva and the liNga within the culture of a number of tribes, e.g. the Gonds: “There are, in the archaic Gond legend of Lingo Pen, intimations of an age when Mahadeva or Shiva, the wild and wondrous god of the autochthons, had no human form but was a rounded stone, a lingam, washed by the waters of the river Narmada. Even to this day there are areas of the Narmada river basin where every stone in the waters is said to be a Shiva lingam: ‘(…) What was Mahadev doing? He was swimming like a rolling stone, he had no hands, no feet. He remained like the trunk (of a tree).’ [Then, Bhagwan makes him come out of the water and grants him a human shape.]” Till today, Shiva or a corresponding tribal god is often venerated in the shape of such natural-born, unsculpted, longish but otherwise shapeless stones."
January 1, 1970
https://en.wikiquote.org/wiki/Pupul_Jayakar