The only confirmed record I have for Anna Bailey is on the birth certificate of my g. grandfather Francis Richard Bailey. The birth date is 04 Apr 1856 at Union Workhouse Williton. There isn't anything for Francis Richard until his marriage to Mary Ann Exon in 1876 in Williton.
There is an entry in the 1861 census:
Hanna Bailey 27 St Andries, Somerset
Richard Son 5 St Decumans, Somerset
Robert John 3 mths St Decumans, Somerset
I can't confirm that this could be Anna and Francis Richard but it's the closest I can find and the ages match.
Any help is very welcome and appreciated.
Thanks, Tina