Would need the marriage certificate to confirm but I believe Eliza was married to William A Ryland in 1882 at Stroud. She died in 1925. The census records show she was born 1861 in Blakeney and there's only one such birth recorded.

I also noted the 1911 census shows Sarah had 7 children of whom 6 were still alive. I can only find six, including Eliza, so I assume there was another who died young. If Eliza had died young, there should be records of another child.