1851 census help please

[Margaret in Burton]

Can anyone find Elizabeth Featherstone in 1851 please?

Here she is in 1861, but a servant.

This is a link to FMP as I cant find her on Ancestry

https://search.findmypast.co.uk/reco...1%2F0019122982

It's RG09- 3738- 74-3

I'm trying to find her with her parents. I'm trying to avoid buying her marriage cert.

Her birth registration is the March quarter of 1842 in Durham and Lanchester. MMN FORSTER

There is a Forster on that same 1861 census, maybe her grandfather?

I can't find a suitable Featherstone and Forster marriage either post 1837 so assume it's prior to that.