Hello again Gillian,
It probably is a good idea to start a new thread.
Only because the Subject Line of this one doesn't indicate what you
now need to find.
What you
now need, I think, is a census lookup request in the 1861 and 1871 for Priscilla THOMAS born ca 1853/1854 Leeds.
And yes - any new thread needs a cross-reference to this thread.
(When you are posting the message on your new thread, just go up to the 'Address' box near the top of your screen; highlight what it says in that 'Address' box - it starts with
http://www.rootschat etc; Copy it; then Paste it into your message).
So that RootsChatters don't duplicate searches which have already been carried out, the new thread also needs to mention that you already have the 1871 census details for the Priscilla THOMAS in the household of Henrietta THOMAS but that you are wondering if anyone can find an appropriate Priscilla in 1861 and/or another appropriate Priscilla THOMAS in 1871.
As I said in Reply #21 above:
So the known facts are that Priscilla SKIPSEY is recorded in the 1881 census as aged 28 and born Leeds. And that on the birth certificate of her daughter Maud, Priscilla's maiden name is recorded as THOMAS.
There's a likely candidate - Priscilla THOMAS, birth, March quarter 1854, Leeds.
I guess you've searched for Priscilla THOMAS, age ca 7, born Leeds in the 1861 census? If not that would be a good idea.
If I were you, I'd certainly try for the 1861 and for another Priscilla in the 1871. Actually, I suspect that the Priscilla in the 1871 census with Henrietta as hoh is quite likely to be yours - and that 'married' was a little fib. And I also feel confident that the Priscilla in 1871 is NOT Henrietta's daughter. But I have no proof.
Unfortunately, it may end up that you have to spend money

getting the 1874 marriage cert of James SKIPSEY & Priscilla THOMAS, and perhaps that 1854 Leeds birth cert of a Priscilla THOMAS, and perhaps even the Dec qtr 1866 Leeds birth cert of Fanny S THOMAS. I hope not

Best regards,
JAP