Thanks.I had seen that on the IGI. It could work, depending on how long before her baptism she was born. If her baptism was only months after her birth then she would have been on the young side when she got married. And although her ages recorded on the census returns vary, in 1851 the age suggests a birth date closer to 1790.
But a gap of a year between birth and baptism and Id feel more comfortable with that particular Jane.
Thank you very much for taking the trouble to look.