writes: "It appears to me that you would be glad to know the following about the Kena-upanishad, as it occurs in my MS. of the Talavakâra-brâhmana.
The last book but one of this Brâhmana is termed Upanishad-brâhmana. It consists of 145 khandas treating of the Gâyatra-sâman, and the 134th is a Vamsa. The Kena-upanishad comprises the 135-145 khandas, or the tenth anuvâka of a chapter. The 139th section begins: âsâ vâ idam agra âsît, &c.
My MS. of the Talavakâra-brâhmana agrees, as regards the contents, exactly with what Sankara says, but not in the divisions. He says that the Kena-upanishad begins the ninth adhyâya, but that is not so in my MS. Neither the beginning nor the end of this Upanishad is noticed particularly.
The last book of this Brâhmana is the Ârsheya-brâhmana, which I printed last February.
Among the teachers quoted in the Brâhmana I have noticed both Tândya and Sâtyâyani. I should not be surprised to find in it the difficult quotations which are incorrectly given in the MSS. of Sâyana's commentary on the Rig-veda. The story of Apâlâ, quoted by Sâyana in his commentary on the Rig-veda, VIII, 80, as from the Sâtyâyanaka, is found word for word, except some trivial var. lectiones, in sections 220-221 of the Agnishtoma book of the Talavakâra-brâhmana. The Sâtyâyanins seem to be closely connected with the Talavakâra-sâkhâ."
From a communication made by Dr. Burnell to the Academy (1 Feb. 79), I gather that this Talavakâra-brâhmana is called by those who study it "Gaiminîya-brâhmana," after the Sâkhâ of the Sâma-veda which they follow. The account given in the Academy differs on some particulars slightly from that given in Dr. Burnett's letter to me. He writes: "The largest part of the Brâhmana treats of the sacrifices and the Sâmans used at them. The first chapter is on the Agnihotra, and the Agnishtoma and other rites follow at great length. Then comes a book termed Upanishad-râhmana. This contains 145 sections in four chapters. It begins with speculations on the Gâyatra-sâman,