Hi, I was reading your posting concerning William Knapper, your Great great Grandfather and you saide that you thought that he was born around 1830. I have a marriage record for William in which it states his age and Ellens:
Knapper, William, age 23.
Wife: Ellen Wilkinson, age 22.
Marriage Date: 5 August 1850.
Recorded in: Bucknall Cum, Bagnall, Stafford, England.
This would make William born in 1827 and Ellen born in 1828. Just some help, I hope it is useful to you.