I don't know if anyone can help, but it's something I have been trying to research.
This information is from my grandmother.
My great grandmother's sister (Edith Maude ADAMS) married a "Jack" Boxall sometime around 1910-1920. They had three(?) children named Phyliss, Harry and another girl all born sometime after 1912. (They were a bit younger than my grandmother who was born in 1912)
Edith was last heard from when she was in hospital in Chichester (sometime before 1930). Apparently my great grandmother lost touch with her after Jack took her out of hospital. They left no forwarding address.
I am hoping that someday I will find out what happened to her.