Hi Andrew, I have had a bit of a look at the census. questions:
* do you know for certain that William henry 1870 is the son of George & Elizabeth because the only one showing on the 1871 census born 1870 Romford is the son of David & Susannah
* Where did the other children's names come from as the only Louis born I can find within reasonable dates is with William Henry & the places/ref don't match so not twins:
Births Mar 1870   
STEVENSON  Charles Arthur A     W. Ham  4a 53   
STEVENSON  Louis John     W. Ham  4a 66   
STEVENSON  William Henry     Romford  4a 136 
* Where did the other family's info come from ie childrens names for William & Elizabeth
the only way to do this is to work backwards so we need to start with William Henry who is the only date we have. what is your relationship to him? is he a confirmed member of your tree?
this is not meant as criticism - I am happy to help but think we need to do this logically.
Diddy  
