hark back

He must have overshot the mark, and must hark back. So he turned his weary horse's head, and made his way back along the road to the spot where his spoor struck into it.

Mr. Flemyng, who had been assuaging his thirst with more champagne during the afternoon, had harked back to the subject of his morning's discourse, and was laying down an authoritative scheme of ethics, in the course of which sundry hard words, such as transcendentalism, pseudo-materialism and the like, lost a syllable here and there.