Hello there and welcome to Rootschat

Who is the birth cert for (I'd say Monks too

) and where and when !
Have you not found this child with her parents on any censuses?
Is it possibly thia marriage,although there's no guarantee that Eliza married Robert without further checks.
Marriages Sep 1869
Monks Eliza Romford 4a 169
Smart Alfred Romford 4a 169
TURNBULL Robert Romford 4a 169
WRIGHT Emily Mary Romford 4a 169