Hello Janet,
I too am looking for an Anne Jones from Yspytty Ystywth, who was born circa 1828. She was the daughter of Thomas Jones, a miner. Have you perchance found any information about her in your research?
My findings have Anne Jones marrying Thomas Jones of Ystrad Meurig on 7 Mar 1849 at Ysbytty Ystwyth church. They lived near Ystrad Meurig in a cottage called Blaen Sychnant. She was still alive in 1901 for the census.
I've recently ordered the Ysbytty Ystwyth parish records from my local LDS family history center, so I'll keep an eye out for your Ann Jones when I am reviewing those records.
regards,
Chris
Battle Creek, Michigan USA