Yes Ethel was born Ethel Susan Baskwill in 1882 in Totnes, Devon. Although she never legally married, she died as Ethel Susan Head in Richmond, Surrey in 1967.
I started to dig into this niece who lived in Detroit and I think she's actually a member of Ethel's extended family, she was born Irene Farley and married another Devonian, Frederick Scadding in the USA. Wondering whether Mark was going to go out to the USA and get a job, then Ethel was going to follow him. But that never happened and they ended up living in Totnes by 1939.