I expect you have your answers now. If not: parents of Sarah Tebby b Cottisford 22 Mar 1818:
10th child of Henry Tebby - chr Cottisford 6 Jun 1774, labourer; d Cottisford 6 Mar 1844 - and Sarah Hodgkins b 1766, married HT 1793 Mixbury, Oxford; d 31 Dec 1844 Cottisford