I have information that Robert's father was John Denham Wall and I have added a lot of information based on this, but alas have not found Robert or the girls.
John Denham Wall is the son of Charles Dudley Wall and Sophia Denham.
Charles Dudley Wall is the son of William Wall and Deborah Dudley.
Luckily they came from the London area and Baptisms have given me a wealth of information.
Transcibing errors in census have seen the name spelt Walle and Dewall