Thankyou Soosi. What a nice person you are to take the trouble to look up stuff when it is not your own family.
I will do as you suggest and try Sochaux mairie. In which years was there a census in this area? Thankyou for checking 1906,later would not be useful as this seems to indicate she had already left. She married in 1910.
In the early 70's she came to England to live with our family. She died in 1982 in England so no death cert in France. The English one states Saurette as her name.
She did marry again in France to surname Faivre. He apparently had a fromagerie in Blamont. Doubs.No other info I'm afraid.
Can you believe when she arrived in England by boat she had absolutely no documents and no passport...but they let her in....wouldn't happen now I think.