Thanks Carol. I was happy from the censuses that I'd got Henry marrying a Harriet but wanted to know more about Harriet Waterhouse's birth date and parents so I could hopefully- eliminate her from the censuses on the grounds of wrong age ! I was also hoping to find her parents so, when I get the marriage certificate, I'll know if it is the right father at least.
It's a right awkward family; Henry's father was Abraham White and he married a Catherine or Kitty Memnett or Memmett or Memmet depending on the spelling. Just when I think I've got that nailed it turns out that Kitty's father was the "reputed son of Sarah Memnett" and Kitty's mother was a foundling from Ackworth hospital ( ie could have been a Londoner) with no surname given !
Grrr!!
(Edit: Sorry. forgot to say, thanks for the 1851; didn't manage to find that.)