Thank-you so much for providing that most edifyng of Monumental Inscriptions, Donna. Found at least one child I didn't even know existed.

If I were a betting woman; my money is on one Elizabeth. After age ninety, it's sort of like dog years. You multiply each additional year by a factor of two or so. Ninety-two. Ninety six. What's the diff? Or as Longfellow put it.: "Hardly a man is now alive who remembers that famous day and year", so to speak.
I haven't trawled around for a likely Elizth Cowell in the censuses. Your suggestions are the logical way to go about being sure. Wish I had access to the 1911 census.

CAIN, Lewis Nowall Dbc 16 Aug 1965 No age at death given. Any chance he has a MI? or his possible sister Isabella Ellen?
CAIN, Ellen 86 Dbc 19 Jul 1960.

I mean. No good deed goes unpunished. I got lucky once. Why not try again? Or are you up on this line of Cains already and into the twenty first century. That's the direction I'm going with this inquiry.