I wonder if there is a relation, although Sarah was on Catharine's death record (1866) and Robert's (1839).
For the certificate here's what I have:
Certificate #38,
Marriage: November 20, 1852
George 20yo/Jane 22yo. George was a Laborer. He lived in Studley Calne, Jane lived in Studley Chippenham. Jane's father wass Joseph Britten. He is listed as a labourer.
Marriage took place at the Primitive Methodist Chapel in Chippenham.
Witnesses were George Britten and Susana Britten (Which I believe are siblings a few of her siblings.)
The Minister was Rev. Levi Ramsden, and the registrar was Edward Bradbury.
Cindy