Barbara, I must be sounding like the proverbial squeaky wheel. My LAST request to you whenever you have a moment, and before I have to put you on the payroll.
Would you kindly check the 1871 census for Emma Hastings age 19 residing in Camberwell and if her place of birth matches Marylebone,Middx/London and if there is a Mr Brown. Just a wild hunch. I see there are three Emma's in Lambeth and one in Camberwell where her brother was born. (1837online index)
Many thanks