This marriage took place in Finsbury, London. I guessed at her family/parents and birth date based on the fact that there was only one Elsom family with children christened about that time in the area where her second marriage took place--St Leonard's Shoreditch. So no actual facts about her age or family. Just a guess.
The article about the marriage law was interesting. It looks like in 1814 the law was 21 for both parties or permission--unless they eloped and no one knew them.
I may never figure out who Sarah's family was or her birth information. There are so many variations on the spelling, but it is spelled ELSOM on her daughter's marriage and death records.
I appreciate all the help.
Claire