Sorry for the delay in replying, I have been reading and rereading everything that you all have sent.This has all been very helpful in confirming a lot of the information that I have.(the marriages of Martha Annie/Annie Martha,Alice,Annie/Annette, Sarah and of course Harriet who was my grandmother.
Not sure about the death of William James Sewell, there is also a death recorded in 1916 - Shoreditch.but again the age is wrong.
Given that the girls didn't seem to stick with one name, I am wondering whether Annie (born 1887) had another name as well. Goodness knows where she was in 1891, perhaps they forgot to put her on the census or maybe she was in hospital or staying with someone !! I know that she did marry and that her husband died when the Titanic sank. I have spoken to my one remaining aunt and she says that she only knew Annie as Annie and remembers my grandmother going to visit Annie in a mental hospital in Surrey which was where she went after the loss of her husband, I suspect that she was suffering from severe depression although back then it was said that she had lost her mind. I guess that I will have to look through all the Sewell births for that time to see if anything likely turns up, then look for possible marriages and checking against the Titanic victims.
Thanks for the help given.
Betty