From your earlier enquiries (via links) you have brother Thomas arriving with James and family.
Have you followed Thomas's life to see if there is mention of brother James, maybe in a death notice for Thomas?.
From your other enquiry -
"....Catherine's death registration is no.04827/1891 parents not listed I know her parents names from other research I have"
What is your source that gives names for parents of Catherine, and could this information be known to husband James?.
Do you have a marriage certificate for James and Catherine....maybe with parents' names?
If her parent's names were known to husband James, and he was around when Catherine d. 1891, would you expect that those names would be recorded on the death certificate?
That doesn't have to be the case, of course...but I wonder if James might have left the family..before 1891...Catherine would still be a married woman for record.
And his whereabouts, or maybe death, are not known to his family?.