Begins fol. aa:

kṣatrapatir ajāyata iti vacanāt /

caitrarathitvaṃ cāsya kāpayena yojakena yogāt / ete bha caitrarathaṃ kāpeyā ayājayastr iti hi chāndogānāṃ dvirātre śrūyate / tena citrarathasya yājakā kāpeyā eṣa cātipratārī citrarathād anyaḥ san kāpeyānāṃ yā dyotavati yadi caitrarathiḥ syāt samānānvayānāṃ hi prāyeṇa … etc.