It looks like Walter and Susan separated for whatever reason between 1891 and 1901. In 1901 Susan living alone at 92 Short Street, Hull. Husband Walter at Proom Entry, Poterngate, Hull and stated as 'single'. Son Albert in Hull Workhouse.
Certainly, family never together after 1891.
As already stipulated, Elsie died the same year she was born!
Annette