I cannot find a Sarah Ann Ridge in my (my husbands) side of the tree. The first Ridge to appear in our tree is a Lucy Ridge born 1874 in Montford Bridge who married John Blower in 1891.
Her parents were Robert Ridge b.1830 (in Llanerfyl) & Emma Sherry b.1842
Roberts parents were another Robert b.1803 who was married to Elizabeth Jones in 1830.
This Robert appears to have been the illegitimate son of a David Ridge b.1775 (at Rhosoflo) & Elinor Thomas b.1781 who married in 1808 and ran the Rhosoflo Farm.
There does appear to be a lot of Ridges in the area and yours may well be a different branch.
There were a few people of that name on the GenesReunited web site, you may be as well to put a post for help on there. You are welcome to look at my tree on that site but I know there are a lot of people who have a lot more names than I do.
Good luck with your searches, kind regards sheila