Someone named Harriet N Green married James A Robinson at Mitford, Norfolk 2nd qu 1919, and the following children may have been theirs:
William J Robinson b 1st qu 1921 Mitford
Grace R Robinson 3rd qu 1923 Mitford
Dora E.R. Robinson 2nd qu 1925 Mitford
John C Robinson 3rd qu 1927 Mitford
There were two others born at Norfolk & Norwich: Ernest C Robinson 3rd qu 1927 and Kenneth G Robinson b 4th qu 1928.
All these children were born to a mother whose maiden name was Green
...A Harriet Naomi Robinson died at East Dereham, Norfolk 2nd qu 1969. (Her birth date is given as 3rd April 1896) and she was aged 73.
Two of the above children were born during the third qu of 1927, which makes me wonder if there were two Robinson-Green families in the area.
Do you know if Harriet had the middle name of Naomi,
because there is no proof that the marriage to Robinson is her, unless you know that.