Following the Caroux siblings, Louisa appears to be Leon(i)e Louisa [spellings vary]. She married Frederick Ward in 1897. I was following them to see if their sister appeared as a witness at all, but no such luck.
I can't find a marriage between William and Selina - he died in 1895 and I think she may have died as well, as there's a school registration for young William c1898 which states "dead" in the column for parent/guardian