Devon 1841 and 1871 census records are available at British Origins for an annual subscription. I have found them to be very useful. 
British Orisgins, Family History Online and The Genealogist are all sites worth using in addition to Ancestry and Family Search. Despite seeing many complaints about their charges and errors, I have found masses of information which I wouldn't be able to access at all, living in a very remote area. In addition, many of the County Family History Societies do a stalwart job.
However, the baptism records are limited and I think Thor was looking for a maiden name, place of birth and birthdate of her Elizabeth, before 1841, so it is a bit of a problem

Merched