Hi David, Yes this is a difficult one
Found Marriage 12 March 1842 Marown, Witnesses Thomas Kay & Robert Kelly Vicar Duggan
Ann born 3 July 1842 close to wedding date
Wm James 26 Nov 1843 KK German
Eliz 22 June 1845KK German died 1 May 1846
Your other 3 children seem outside the birthing date spread and did not find them on Family Search
Where did you find Wm James marriage info
Regards Rob