Theodore Proferes

"At intermediate points along the way, individual verses and entire hymns were inserted into the RV collection."

"The formation of the ṛksamhita [....] appears to have been carried out in three stages. First, the ‗clan books‘ 2-7 were collected and ordered [....] At a later stage, Books 1 and 8 were added to the case like book ends. It was likely at this stage that Book 9 was added as well. Lastly, the heterogenous material in Book 10 was appended to the entire collection."

"the pavamāna collection consists primarily of late authors, those from Books 1, 5, 8 and in a limited number of cases, 10."

"We need not rely exclusively on the Anukramaṇī to affirm that there were important interactions between the priestly groups represented in Books 1, 5 and 8. As Oldenberg [1888b:213-215] has shown, evidence from the hymns themselves supports this conclusion."

"the clan book composers, except those from Book 5, are not well represented among the pavamāna composers of Book 9."

"These circles are represented by the Kāṇva, Ātreya and Āngirasa authors from Books 1, 5 and 8, as well as by descendants of these authors."

"The connections of Book 5 with Books 1 and 8 and not with the other clan books (2-4, 6-7) is interesting, since it seems to belong to the core RV collection (Oldenberg [1888a]; Witzel [1997])."

"the breakdown of the strict separation of the ritual poetry of different clans and the preservation of that poetry together in a single collection began with the Kāṇva, Ātreya and Āngirasa poets of Books 1, 5 and 8."