Thank you for your suggestion.
The most promising candidate I have for Emma Jones is the one that was born on 4th January 1849 at Ruyton of the XI Towns, to a single mother, Elizabeth Jones. In 1851, Emma was with her grandparents and her grandfather was William Jones, a sawyer. In 1871, she was a servant to an artist's widow in Castle Street, Shrewsbury.
This is by no means conclusive, and it leaves questions unanswered, but I have been unable to trace this particular Emma Jones after 1871 so cannot eliminate her from my search.