Hi,
I have really enjoyed this series. In the last episode "Crossbones girl" I was surprised that they didn't look for Elizabeth Mitchell in the 1851 census because they know she didn't die until August. It would have been another example of records available to historians even if they didn't pin it down to one individual.
I found two single Elizabeth Mitchells in the right area, albeit slightly older than 19. One in Lambeth aged 23, who although descibed as a "dressmaker" I discounted because her father was a butcher in 1841 and she probably wouldn't have had ricketts. The other aged 22 was actually a nurse at St Thomas' where the show's Elizabeth Mitchell died- but would a nurse have been buried in that graveyard?
Sharon