Strange comment since I thought I had done that!
Re David's remarks, this is a perfect example of how genealogists seeking to be helpful and putting down such information as is available ie died after such a date, can lead to errors. Three other (distant)family members had taken that Roughwood listing to mean 1912. I had not checked it since my very elderly aunt had told me "Your grandmother died when your mother was born" when what she had meant to say was "Your grandmother died on your mother's birthday" (Albeit 33 years later!) She compounded the misunderstanding by saying "Of course I had to look after your mother when she was a baby" Of such are errors made.
Anyway the shrouds of mystery are now swept away and many thanks to all the people who have contributed.