""The structure of the text has been more extensively studied, already by Bergaigne (1878-83) and Oldenberg in the 19th century. From the latter's Prolegomena (Oldenberg 1888), it appears that the Ṛgveda was composed and assembled in the following stages, beginning 'at the centre' with books 2-7" (WITZEL 1995b:309)."
Michael Witzel

January 1, 1970