From Alain Daniélou, Gods of Love and Ecstasy: The Traditions of Shiva and Dionysus, p. 59:
[...] the megaliths found in England, Brittany, Corsica, and all over the world, from India to the extreme west. Although there is very little information concerning the megalithic monuments of the West, Hindu texts contain the entire ritual for setting them up, and for the orientation of sanctuaries, etc. All studies on European prehistoric religions should thus be based on the Indian documents available.
Am just wondering which texts these are, and if they are available in English?
Alternatively, are there any studies on these monuments based on the Indian texts?