Hi Carole, 
Many thanks for that info, I had some of it but not all.
As to Norah's age, I did read somewhere that if the husband was a lot older then the wife's age was adjusted so as not to show such a great age difference.   As to them not being married, that is very interesting, did this sort of thing happen a lot then - do you know? 
I agree that the birth year is important and I cannot even trust 100% the age on the death certificate because I understand it is sometimes best guess.      
A bit of a  'brick wall' don't you think?