Clicking further on the IGI - which is an index - will not verify the information you need - the father's occupation, which is in the actual baptism records of East Clandon and Great Bookham so you can try to verify that Henry and George were brothers.
Jane Terrells parents were John and Mary!
JANE TERRELL
Christening: 17 JUL 1817 Saint Mary, Guildford, Surrey
Father: JOHN TERRELL
Mother: MARY
They have other children baptised at St. Mary Guildford from 1811-1822. They are in Guildford on the 1841 census with their youngest child. John was a labourer.
There will be plenty of marriages of William Thomases to Elizabeths. Thomas is the 8th most common surname in the country - so thousands of them.
As I already said the IGI has limited coverage of Surrey, so about as much chance of finding an entry as not finding one.
I have given you the reference for a much more comprehensive index. Local library's have fiche machines so a fiche you purchase can be viewed at a library. However like the IGI it is an index and sooner or later the actual parish registers held in county record offices are necessary to see for further details.
Regards
Valda
