Hi Shirl,
1851 census she is married to William Moore in Lyme Regis birthplace Church Taunton, Somerset, year of birth 1795
1861 census, still married to William. birthplace Churchstanton, Somerset, year of birth 1796.
1841 census just says not born in Dorset.
I have looked at the Genuki Churchstanton baptisms and yes, there's no Sarah Walling. There are 2 Wallen children born at the right time to be siblings, William bapt 1788 and Betty bapt 1791 they are children of William and Sarah Wallen. William snr appears to have died aged 38 and a pauper in May 1794, causes unknown, and I suppose Sarah could have conceived a child right up to the point of his death thereby having the baby early 1795. I guess being newly a widow she may not have been able to afford to baptize her child or else she was baptized in a different parish.
Sarah snr died a pauper in Eckham (a tiny hamlet in the parish of Churchstanton) in 1844 and buried in Churchstanton. On the 1841 census she is named as Walling and is living in Churchstanton with her married daughter Betty and her family, called Burford.
Unless you or anyone else can thrown more light on this conundrum I can only assume I have the right parents.
Thanks, Diane