My GG grandmother Mary Johns (or John) born about 1845 came from Pembrokeshire but married a chap from Sussex called David Bates. They spent most of their lives in Sussex, but briefly lived in Glamorganshire, where he worked in the mines. Her Father was called Thomas. She had two children : Sarah & Alfred. After her marriage & post-1881, on different censuses she puts her birthplace as either - Llawhaden, Narberth, Pembrokeshire or South Wales. However, on the 1851, 1861, 1871 censuses I have a selection of people for each census which could be her. I have been stuck for several years on this. This is also hindered by the fact that I suspect the surname should be John, although written as Johns on the marriage certificate. Grrr.