Looking at all this information, I had a sudden thought. When Lillian Hallowell died, she gives her mother's first name as Lillian. On the 1920 census, with Julia Watterson, in the same household is Lillian Everall, age 35, divorced. Could this possibly be her mother, with wrong age, and wrong first name, and last name spelled differently? Would explain why we didn't find Lizzie's death 1910-1920. Perhaps she was trying to distance herself from Benjamin and the tragic situation.
I know it says Lillian's parents born Pennsylvania which is not true, if she is Lizzie, mother of Julia, but it says that same thing for Julia's parents which is also not true. Benjamin was born Ireland and so is Lizzie, as per 1910 census, as were both their parents.
I know it is a wild thought but maybe it is the case. Benjamin says in 1930 he is married, but in 1940, says widowed. If we can possibly rely on that info, Lizzie, possibly Lillian, died 1930-1940.
