Have you found the information requested?
Stafford Samuel Culverhouse Benson (husband of Katherine Louisa Lowing) was the son of Eliza Gertrude Haviland - whereby my interest - and Peter Culverhouse Benson.
Ancestry family sources give Katherine's parents as George Edward Lowing and Mary Tolfield. However, when Katherine's sister Lily Maud Lowing married in Ontario, she gave her mother's name as Mary Brown.
If any of this is new to you, I would be happy to share.