Some things to bear in mind as you continue your search
..
Dates of baptisms are NOT dates of birth.
You dont know what a record contains by looking at the index.
The 1851 census shows all of your family were born in
Port Glasgow, not Paisley.
How do you know Jane was born in 1826 if you have no birth record?
Where does information about Susannah being 3rd daughter come from, and how do you know it is correct?
When did the father William begin work as a school master, and what did he do before that?
Good luck.
