I also cannot figure out what it is you want to know about Sarah Pratt.
You know where/when she was and that father is Joseph and this is surely her baptism:
Sarah Pratt born 11/9/1842, bp.13/4/1856 Bromsgrove, dau. of Joseph and Elizabeth.
She appears on 1881/1891/1901 census and appears to have died June quarter 1910 Preston.
Annette