To the White Yajurveda belongs the Çrauta Sutra of Katyayana. This manual, which consists of twenty-six chapters, on the whole strictly follows the sacrificial order of the Çatapatha Brahmana. Three of its chapters (xxii.-xxiv.), however, relate to the ceremonial of the Samaveda. Owing to the enigmatical character of its style, it appears to be one of the later productions of the Sutra period. No less than six Çrauta Sutras belonging to the Black Yajurveda have been preserved, but only two of them have as yet been published. Four of these form a very closely connected group, being part of the Kalpa Sutras of four subdivisions of the Taittiriya Çakha, which represented the later sutra schools (charanas) not claiming a special revelation of Veda or Brahmana. The Çrauta Sutra of Apastamba forms the first twenty-four of the thirty chapters (praçnas) into which his Kalpa Sutra is divided; and that of Hiranyakeçin, an offshoot of the Apastambas, the first eighteen of the twenty-nine chapters of his Kalpa Sutra. The Sutra of Baudhayana, who is older than Apastamba, as well as that of Bharadvaja, has not yet been published. Connected with the Maitrayani Samhita is the Manava Çrauta Sutra. It belongs to the Manavas, who were a subdivision of the Maitrayaniyas, and to whom the law-book of Manu probably traces its origin. It seems to be one of the oldest. It has a descriptive character, resembling the Brahmana parts of the Yajurveda, and differing from them only in simply describing the course of the sacrifice, to the exclusion of legends, speculations, or discussions of any kind. There is also a Vaikhanasa Çrauta Sutra attached to the Black Yajurveda, but it is known only in a few MSS. The Çrauta Sutra of the Atharva-veda is the Vaitana Sutra. It is neither old nor original, but was undoubtedly compiled in order to supply the Atharva, like the other Vedas, with a Sutra of its own. It probably received its name from the word with which it begins, since the term vaitana ("relating to the three sacrificial fires") is equally applicable to all Çrauta Sutras. It agrees to a considerable extent with the Gopatha Brahmana, though it distinctly follows the Sutra of Katyayana to the White Yajurveda. One indication of its lateness is the fact that whereas in other cases a Grihya regularly presupposes the Çrauta Sutra, the Vaitana is dependent on the domestic sutra of the Atharva-veda.