I assume this is Rose in 1901:
http://www.census.nationalarchives.ie/pages/1901/Londonderry/Bellaghy/Drumanee_Lower/1541322/
And 1911:
http://www.census.nationalarchives.ie/pages/1911/Londonderry/Londonderry...
Her probable death at Nazareth House, Bishop St, Londonderry, in October 1911:
Ballyuscullion’s RC records start in 1844, so James & Rose probably married before that. I looked for children baptised to them 1844 onwards but did not find any.