"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."