The Vedanta Sutras of Badarayana, Commentary by Sankara (SBE38), tr. by George Thibaut  at sacred-texts.com
48. And because (indicatory marks of that) are seen (in the text).
And that there are to be observed indicatory marks leading to the same conclusion, has already been declared in Sûtra 44.--But, under Sûtra 45, it was shown that indicatory marks unaided by other reasons cannot be admitted as proving anything, and it was consequently determined that, owing to the influence of the leading subject-matter, the Agnis form part of the sacrificial action!--To this objection the next Sûtra replies.